./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe004_tso.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_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe004_tso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/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 8b5bddfef3ba7869d349ebe06c117f44aa1f95a0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 15:38:48,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 15:38:48,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 15:38:48,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 15:38:48,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 15:38:48,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 15:38:48,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 15:38:48,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 15:38:48,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 15:38:48,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 15:38:48,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 15:38:48,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 15:38:48,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 15:38:48,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 15:38:48,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 15:38:48,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 15:38:48,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 15:38:48,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 15:38:48,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 15:38:48,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 15:38:48,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 15:38:48,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 15:38:48,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 15:38:48,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 15:38:48,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 15:38:48,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 15:38:48,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 15:38:48,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 15:38:48,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 15:38:48,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 15:38:48,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 15:38:48,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 15:38:48,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 15:38:48,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 15:38:48,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 15:38:48,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 15:38:48,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 15:38:48,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 15:38:48,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 15:38:48,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 15:38:48,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 15:38:48,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 15:38:48,272 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 15:38:48,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 15:38:48,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 15:38:48,273 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 15:38:48,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 15:38:48,273 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 15:38:48,273 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 15:38:48,273 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 15:38:48,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 15:38:48,273 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 15:38:48,273 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 15:38:48,273 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 15:38:48,274 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 15:38:48,274 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 15:38:48,274 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 15:38:48,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 15:38:48,274 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 15:38:48,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 15:38:48,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 15:38:48,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 15:38:48,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 15:38:48,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 15:38:48,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 15:38:48,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 15:38:48,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 15:38:48,276 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 15:38:48,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 15:38:48,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 15:38:48,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 15:38:48,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 15:38:48,277 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_57ceef2e-0742-4796-81cf-060e36a49b14/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b5bddfef3ba7869d349ebe06c117f44aa1f95a0 [2020-12-09 15:38:48,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 15:38:48,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 15:38:48,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 15:38:48,464 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 15:38:48,465 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 15:38:48,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe004_tso.opt.i [2020-12-09 15:38:48,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/data/59975626b/359a893957a54f0a966f661ac4967918/FLAG061eb91b4 [2020-12-09 15:38:48,936 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 15:38:48,936 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/sv-benchmarks/c/pthread-wmm/safe004_tso.opt.i [2020-12-09 15:38:48,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/data/59975626b/359a893957a54f0a966f661ac4967918/FLAG061eb91b4 [2020-12-09 15:38:48,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/data/59975626b/359a893957a54f0a966f661ac4967918 [2020-12-09 15:38:48,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 15:38:48,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 15:38:48,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 15:38:48,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 15:38:48,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 15:38:48,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:38:48" (1/1) ... [2020-12-09 15:38:48,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad3c530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:48, skipping insertion in model container [2020-12-09 15:38:48,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:38:48" (1/1) ... [2020-12-09 15:38:48,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 15:38:49,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 15:38:49,108 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_57ceef2e-0742-4796-81cf-060e36a49b14/sv-benchmarks/c/pthread-wmm/safe004_tso.opt.i[949,962] [2020-12-09 15:38:49,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:38:49,212 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 15:38:49,222 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_57ceef2e-0742-4796-81cf-060e36a49b14/sv-benchmarks/c/pthread-wmm/safe004_tso.opt.i[949,962] [2020-12-09 15:38:49,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:38:49,313 INFO L208 MainTranslator]: Completed translation [2020-12-09 15:38:49,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49 WrapperNode [2020-12-09 15:38:49,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 15:38:49,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 15:38:49,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 15:38:49,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 15:38:49,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... [2020-12-09 15:38:49,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... [2020-12-09 15:38:49,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 15:38:49,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 15:38:49,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 15:38:49,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 15:38:49,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... [2020-12-09 15:38:49,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... [2020-12-09 15:38:49,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... [2020-12-09 15:38:49,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... [2020-12-09 15:38:49,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... [2020-12-09 15:38:49,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... [2020-12-09 15:38:49,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... [2020-12-09 15:38:49,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 15:38:49,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 15:38:49,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 15:38:49,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 15:38:49,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/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 15:38:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 15:38:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 15:38:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 15:38:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 15:38:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 15:38:49,432 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 15:38:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 15:38:49,433 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 15:38:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-09 15:38:49,433 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-09 15:38:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 15:38:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 15:38:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 15:38:49,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 15:38:49,434 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 15:38:49,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 15:38:49,661 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 15:38:49,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:38:49 BoogieIcfgContainer [2020-12-09 15:38:49,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 15:38:49,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 15:38:49,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 15:38:49,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 15:38:49,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:38:48" (1/3) ... [2020-12-09 15:38:49,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c96e82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:38:49, skipping insertion in model container [2020-12-09 15:38:49,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:49" (2/3) ... [2020-12-09 15:38:49,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c96e82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:38:49, skipping insertion in model container [2020-12-09 15:38:49,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:38:49" (3/3) ... [2020-12-09 15:38:49,669 INFO L111 eAbstractionObserver]: Analyzing ICFG safe004_tso.opt.i [2020-12-09 15:38:49,678 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 15:38:49,678 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 15:38:49,680 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 15:38:49,681 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 15:38:49,701 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,702 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,702 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,702 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,702 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,702 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,702 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,702 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,703 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,703 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,703 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,703 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,703 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,703 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,703 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,704 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,704 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,704 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,704 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,704 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,704 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,704 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,704 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,705 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,705 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,705 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,705 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,705 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,705 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,705 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,705 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,706 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,706 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,706 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,706 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,706 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,708 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,708 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,708 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,708 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,712 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,712 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,712 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,712 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,713 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,714 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,714 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,714 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 15:38:49,715 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 15:38:49,723 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 15:38:49,737 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 15:38:49,737 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 15:38:49,737 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 15:38:49,737 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 15:38:49,737 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 15:38:49,737 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 15:38:49,737 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 15:38:49,738 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 15:38:49,746 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 15:38:49,747 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 74 transitions, 163 flow [2020-12-09 15:38:49,749 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 74 transitions, 163 flow [2020-12-09 15:38:49,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 163 flow [2020-12-09 15:38:49,780 INFO L129 PetriNetUnfolder]: 2/71 cut-off events. [2020-12-09 15:38:49,780 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 15:38:49,783 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 57 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2020-12-09 15:38:49,785 INFO L116 LiptonReduction]: Number of co-enabled transitions 1296 [2020-12-09 15:38:51,508 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-12-09 15:38:51,723 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-12-09 15:38:51,798 INFO L131 LiptonReduction]: Checked pairs total: 2466 [2020-12-09 15:38:51,799 INFO L133 LiptonReduction]: Total number of compositions: 61 [2020-12-09 15:38:51,802 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 61 flow [2020-12-09 15:38:51,827 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 362 states. [2020-12-09 15:38:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states. [2020-12-09 15:38:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 15:38:51,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:51,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:51,833 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:51,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1644080523, now seen corresponding path program 1 times [2020-12-09 15:38:51,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:51,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385550174] [2020-12-09 15:38:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:51,974 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 15:38:51,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385550174] [2020-12-09 15:38:51,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:51,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:38:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189242737] [2020-12-09 15:38:51,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 15:38:51,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 15:38:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 15:38:51,994 INFO L87 Difference]: Start difference. First operand 362 states. Second operand 2 states. [2020-12-09 15:38:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:52,022 INFO L93 Difference]: Finished difference Result 362 states and 1072 transitions. [2020-12-09 15:38:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 15:38:52,024 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 15:38:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:52,036 INFO L225 Difference]: With dead ends: 362 [2020-12-09 15:38:52,037 INFO L226 Difference]: Without dead ends: 298 [2020-12-09 15:38:52,037 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 15:38:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-09 15:38:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-12-09 15:38:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-12-09 15:38:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 864 transitions. [2020-12-09 15:38:52,095 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 864 transitions. Word has length 8 [2020-12-09 15:38:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:52,096 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 864 transitions. [2020-12-09 15:38:52,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 15:38:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 864 transitions. [2020-12-09 15:38:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 15:38:52,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:52,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:52,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 15:38:52,098 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:52,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:52,098 INFO L82 PathProgramCache]: Analyzing trace with hash 573104580, now seen corresponding path program 1 times [2020-12-09 15:38:52,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:52,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569617155] [2020-12-09 15:38:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:52,184 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 15:38:52,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569617155] [2020-12-09 15:38:52,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:52,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:38:52,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945760480] [2020-12-09 15:38:52,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:38:52,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:52,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:38:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:38:52,187 INFO L87 Difference]: Start difference. First operand 298 states and 864 transitions. Second operand 4 states. [2020-12-09 15:38:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:52,233 INFO L93 Difference]: Finished difference Result 487 states and 1377 transitions. [2020-12-09 15:38:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 15:38:52,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 15:38:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:52,237 INFO L225 Difference]: With dead ends: 487 [2020-12-09 15:38:52,237 INFO L226 Difference]: Without dead ends: 312 [2020-12-09 15:38:52,238 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 15:38:52,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-09 15:38:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 262. [2020-12-09 15:38:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-09 15:38:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 672 transitions. [2020-12-09 15:38:52,258 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 672 transitions. Word has length 9 [2020-12-09 15:38:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:52,259 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 672 transitions. [2020-12-09 15:38:52,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:38:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 672 transitions. [2020-12-09 15:38:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 15:38:52,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:52,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:52,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 15:38:52,261 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1603605898, now seen corresponding path program 1 times [2020-12-09 15:38:52,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:52,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167198633] [2020-12-09 15:38:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:52,336 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 15:38:52,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167198633] [2020-12-09 15:38:52,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:52,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:38:52,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775082590] [2020-12-09 15:38:52,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 15:38:52,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:52,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 15:38:52,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:52,338 INFO L87 Difference]: Start difference. First operand 262 states and 672 transitions. Second operand 5 states. [2020-12-09 15:38:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:52,383 INFO L93 Difference]: Finished difference Result 343 states and 850 transitions. [2020-12-09 15:38:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 15:38:52,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 15:38:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:52,386 INFO L225 Difference]: With dead ends: 343 [2020-12-09 15:38:52,386 INFO L226 Difference]: Without dead ends: 248 [2020-12-09 15:38:52,387 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 15:38:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-09 15:38:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 212. [2020-12-09 15:38:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-09 15:38:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 529 transitions. [2020-12-09 15:38:52,398 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 529 transitions. Word has length 10 [2020-12-09 15:38:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:52,398 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 529 transitions. [2020-12-09 15:38:52,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 15:38:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 529 transitions. [2020-12-09 15:38:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 15:38:52,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:52,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:52,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 15:38:52,400 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:52,401 INFO L82 PathProgramCache]: Analyzing trace with hash 996952264, now seen corresponding path program 1 times [2020-12-09 15:38:52,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:52,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350089832] [2020-12-09 15:38:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:52,464 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 15:38:52,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350089832] [2020-12-09 15:38:52,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:52,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:38:52,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364544951] [2020-12-09 15:38:52,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 15:38:52,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 15:38:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:52,466 INFO L87 Difference]: Start difference. First operand 212 states and 529 transitions. Second operand 5 states. [2020-12-09 15:38:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:52,512 INFO L93 Difference]: Finished difference Result 270 states and 659 transitions. [2020-12-09 15:38:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 15:38:52,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 15:38:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:52,514 INFO L225 Difference]: With dead ends: 270 [2020-12-09 15:38:52,514 INFO L226 Difference]: Without dead ends: 226 [2020-12-09 15:38:52,515 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 15:38:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-09 15:38:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 188. [2020-12-09 15:38:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-09 15:38:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 456 transitions. [2020-12-09 15:38:52,520 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 456 transitions. Word has length 11 [2020-12-09 15:38:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:52,520 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 456 transitions. [2020-12-09 15:38:52,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 15:38:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 456 transitions. [2020-12-09 15:38:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 15:38:52,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:52,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:52,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 15:38:52,522 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash 996954186, now seen corresponding path program 1 times [2020-12-09 15:38:52,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:52,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140436606] [2020-12-09 15:38:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:52,566 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 15:38:52,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140436606] [2020-12-09 15:38:52,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:52,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:38:52,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574769370] [2020-12-09 15:38:52,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 15:38:52,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 15:38:52,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:52,569 INFO L87 Difference]: Start difference. First operand 188 states and 456 transitions. Second operand 5 states. [2020-12-09 15:38:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:52,622 INFO L93 Difference]: Finished difference Result 248 states and 593 transitions. [2020-12-09 15:38:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 15:38:52,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 15:38:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:52,625 INFO L225 Difference]: With dead ends: 248 [2020-12-09 15:38:52,625 INFO L226 Difference]: Without dead ends: 204 [2020-12-09 15:38:52,625 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 15:38:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-09 15:38:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 164. [2020-12-09 15:38:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-09 15:38:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 383 transitions. [2020-12-09 15:38:52,632 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 383 transitions. Word has length 11 [2020-12-09 15:38:52,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:52,632 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 383 transitions. [2020-12-09 15:38:52,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 15:38:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 383 transitions. [2020-12-09 15:38:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 15:38:52,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:52,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:52,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 15:38:52,634 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:52,634 INFO L82 PathProgramCache]: Analyzing trace with hash -828726514, now seen corresponding path program 1 times [2020-12-09 15:38:52,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:52,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361692591] [2020-12-09 15:38:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:52,688 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 15:38:52,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361692591] [2020-12-09 15:38:52,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:52,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 15:38:52,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013532664] [2020-12-09 15:38:52,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:38:52,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:52,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:38:52,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 15:38:52,689 INFO L87 Difference]: Start difference. First operand 164 states and 383 transitions. Second operand 6 states. [2020-12-09 15:38:52,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:52,753 INFO L93 Difference]: Finished difference Result 297 states and 697 transitions. [2020-12-09 15:38:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 15:38:52,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-09 15:38:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:52,755 INFO L225 Difference]: With dead ends: 297 [2020-12-09 15:38:52,755 INFO L226 Difference]: Without dead ends: 216 [2020-12-09 15:38:52,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-09 15:38:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-09 15:38:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 146. [2020-12-09 15:38:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-09 15:38:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 344 transitions. [2020-12-09 15:38:52,759 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 344 transitions. Word has length 12 [2020-12-09 15:38:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:52,760 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 344 transitions. [2020-12-09 15:38:52,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:38:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 344 transitions. [2020-12-09 15:38:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 15:38:52,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:52,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:52,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 15:38:52,761 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:52,761 INFO L82 PathProgramCache]: Analyzing trace with hash 840731782, now seen corresponding path program 2 times [2020-12-09 15:38:52,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:52,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583347882] [2020-12-09 15:38:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:52,797 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 15:38:52,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583347882] [2020-12-09 15:38:52,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:52,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:38:52,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230097944] [2020-12-09 15:38:52,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 15:38:52,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 15:38:52,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:52,799 INFO L87 Difference]: Start difference. First operand 146 states and 344 transitions. Second operand 5 states. [2020-12-09 15:38:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:52,830 INFO L93 Difference]: Finished difference Result 179 states and 411 transitions. [2020-12-09 15:38:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 15:38:52,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 15:38:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:52,831 INFO L225 Difference]: With dead ends: 179 [2020-12-09 15:38:52,831 INFO L226 Difference]: Without dead ends: 142 [2020-12-09 15:38:52,832 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 15:38:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-09 15:38:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 118. [2020-12-09 15:38:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-09 15:38:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 267 transitions. [2020-12-09 15:38:52,835 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 267 transitions. Word has length 12 [2020-12-09 15:38:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:52,835 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 267 transitions. [2020-12-09 15:38:52,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 15:38:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 267 transitions. [2020-12-09 15:38:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 15:38:52,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:52,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:52,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 15:38:52,836 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:52,837 INFO L82 PathProgramCache]: Analyzing trace with hash 274334134, now seen corresponding path program 1 times [2020-12-09 15:38:52,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:52,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035417386] [2020-12-09 15:38:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:52,876 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 15:38:52,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035417386] [2020-12-09 15:38:52,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:52,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 15:38:52,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383144684] [2020-12-09 15:38:52,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:38:52,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:52,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:38:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 15:38:52,878 INFO L87 Difference]: Start difference. First operand 118 states and 267 transitions. Second operand 6 states. [2020-12-09 15:38:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:52,908 INFO L93 Difference]: Finished difference Result 144 states and 312 transitions. [2020-12-09 15:38:52,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 15:38:52,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 15:38:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:52,908 INFO L225 Difference]: With dead ends: 144 [2020-12-09 15:38:52,909 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 15:38:52,909 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 15:38:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 15:38:52,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-09 15:38:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 15:38:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 128 transitions. [2020-12-09 15:38:52,912 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 128 transitions. Word has length 13 [2020-12-09 15:38:52,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:52,912 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 128 transitions. [2020-12-09 15:38:52,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:38:52,912 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 128 transitions. [2020-12-09 15:38:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 15:38:52,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:52,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:52,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 15:38:52,913 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:52,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:52,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1006670732, now seen corresponding path program 1 times [2020-12-09 15:38:52,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:52,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905509157] [2020-12-09 15:38:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:52,948 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 15:38:52,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905509157] [2020-12-09 15:38:52,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:52,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:38:52,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612846762] [2020-12-09 15:38:52,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:38:52,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:52,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:38:52,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:38:52,950 INFO L87 Difference]: Start difference. First operand 64 states and 128 transitions. Second operand 4 states. [2020-12-09 15:38:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:52,969 INFO L93 Difference]: Finished difference Result 66 states and 117 transitions. [2020-12-09 15:38:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 15:38:52,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 15:38:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:52,970 INFO L225 Difference]: With dead ends: 66 [2020-12-09 15:38:52,970 INFO L226 Difference]: Without dead ends: 52 [2020-12-09 15:38:52,970 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 15:38:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-09 15:38:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-09 15:38:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 15:38:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 91 transitions. [2020-12-09 15:38:52,972 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 91 transitions. Word has length 14 [2020-12-09 15:38:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:52,972 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 91 transitions. [2020-12-09 15:38:52,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:38:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 91 transitions. [2020-12-09 15:38:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 15:38:52,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:52,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:52,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 15:38:52,972 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:52,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash 48994457, now seen corresponding path program 1 times [2020-12-09 15:38:52,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:52,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615822826] [2020-12-09 15:38:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:52,999 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 15:38:53,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615822826] [2020-12-09 15:38:53,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:53,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 15:38:53,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984961422] [2020-12-09 15:38:53,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 15:38:53,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:53,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 15:38:53,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:53,001 INFO L87 Difference]: Start difference. First operand 52 states and 91 transitions. Second operand 5 states. [2020-12-09 15:38:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:53,022 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2020-12-09 15:38:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 15:38:53,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-09 15:38:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:53,023 INFO L225 Difference]: With dead ends: 42 [2020-12-09 15:38:53,023 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 15:38:53,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 15:38:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 15:38:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 15:38:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 15:38:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2020-12-09 15:38:53,024 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 15 [2020-12-09 15:38:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:53,024 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2020-12-09 15:38:53,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 15:38:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2020-12-09 15:38:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 15:38:53,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:53,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:53,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 15:38:53,025 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:38:53,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:53,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1602840682, now seen corresponding path program 1 times [2020-12-09 15:38:53,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:53,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770045734] [2020-12-09 15:38:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:53,065 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 15:38:53,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770045734] [2020-12-09 15:38:53,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:53,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 15:38:53,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161417404] [2020-12-09 15:38:53,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:38:53,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:38:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 15:38:53,066 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 6 states. [2020-12-09 15:38:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:53,081 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2020-12-09 15:38:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 15:38:53,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-09 15:38:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:53,082 INFO L225 Difference]: With dead ends: 28 [2020-12-09 15:38:53,082 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 15:38:53,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 15:38:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 15:38:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 15:38:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 15:38:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 15:38:53,083 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-12-09 15:38:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:53,083 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 15:38:53,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:38:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 15:38:53,083 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 15:38:53,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 15:38:53,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 03:38:53 BasicIcfg [2020-12-09 15:38:53,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 15:38:53,086 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 15:38:53,086 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 15:38:53,086 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 15:38:53,086 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:38:49" (3/4) ... [2020-12-09 15:38:53,088 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 15:38:53,092 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 15:38:53,093 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 15:38:53,093 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-09 15:38:53,096 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 15:38:53,096 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 15:38:53,096 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 15:38:53,096 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 15:38:53,124 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_57ceef2e-0742-4796-81cf-060e36a49b14/bin/utaipan/witness.graphml [2020-12-09 15:38:53,125 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 15:38:53,126 INFO L168 Benchmark]: Toolchain (without parser) took 4166.59 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 98.9 MB in the beginning and 145.2 MB in the end (delta: -46.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:38:53,126 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 71.3 MB. Free memory was 41.7 MB in the beginning and 41.7 MB in the end (delta: 61.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:38:53,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.34 ms. Allocated memory is still 123.7 MB. Free memory was 98.7 MB in the beginning and 67.8 MB in the end (delta: 30.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2020-12-09 15:38:53,128 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.37 ms. Allocated memory is still 123.7 MB. Free memory was 67.8 MB in the beginning and 65.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:38:53,128 INFO L168 Benchmark]: Boogie Preprocessor took 23.85 ms. Allocated memory is still 123.7 MB. Free memory was 65.8 MB in the beginning and 64.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:38:53,129 INFO L168 Benchmark]: RCFGBuilder took 287.67 ms. Allocated memory is still 123.7 MB. Free memory was 64.3 MB in the beginning and 91.8 MB in the end (delta: -27.5 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2020-12-09 15:38:53,129 INFO L168 Benchmark]: TraceAbstraction took 3421.47 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 91.4 MB in the beginning and 147.3 MB in the end (delta: -55.9 MB). Peak memory consumption was 1.7 MB. Max. memory is 16.1 GB. [2020-12-09 15:38:53,130 INFO L168 Benchmark]: Witness Printer took 39.23 ms. Allocated memory is still 180.4 MB. Free memory was 147.3 MB in the beginning and 145.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:38:53,133 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 71.3 MB. Free memory was 41.7 MB in the beginning and 41.7 MB in the end (delta: 61.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 354.34 ms. Allocated memory is still 123.7 MB. Free memory was 98.7 MB in the beginning and 67.8 MB in the end (delta: 30.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.37 ms. Allocated memory is still 123.7 MB. Free memory was 67.8 MB in the beginning and 65.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.85 ms. Allocated memory is still 123.7 MB. Free memory was 65.8 MB in the beginning and 64.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 287.67 ms. Allocated memory is still 123.7 MB. Free memory was 64.3 MB in the beginning and 91.8 MB in the end (delta: -27.5 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3421.47 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 91.4 MB in the beginning and 147.3 MB in the end (delta: -55.9 MB). Peak memory consumption was 1.7 MB. Max. memory is 16.1 GB. * Witness Printer took 39.23 ms. Allocated memory is still 180.4 MB. Free memory was 147.3 MB in the beginning and 145.2 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 781 VarBasedMoverChecksPositive, 38 VarBasedMoverChecksNegative, 8 SemBasedMoverChecksPositive, 30 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 57 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 82 PlacesBefore, 32 PlacesAfterwards, 74 TransitionsBefore, 23 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 61 TotalNumberOfCompositions, 2466 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: 3.3s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 257 SDtfs, 278 SDslu, 414 SDs, 0 SdLazy, 180 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 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, 11 MinimizatonAttempts, 258 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 131 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 6606 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 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...