./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe014_tso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe014_tso.oepc.i -s /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/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 76a5caa3071fd3b7fdb0794a63eaafb12ee9a50e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:02:11,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:02:11,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:02:11,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:02:11,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:02:11,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:02:11,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:02:11,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:02:11,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:02:11,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:02:11,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:02:11,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:02:11,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:02:11,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:02:11,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:02:11,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:02:11,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:02:11,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:02:11,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:02:11,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:02:11,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:02:11,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:02:11,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:02:11,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:02:11,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:02:11,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:02:11,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:02:11,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:02:11,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:02:11,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:02:11,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:02:11,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:02:11,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:02:11,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:02:11,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:02:11,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:02:11,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:02:11,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:02:11,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:02:11,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:02:11,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:02:11,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:02:11,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:02:11,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:02:11,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:02:11,251 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:02:11,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:02:11,251 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:02:11,251 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:02:11,251 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:02:11,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:02:11,252 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:02:11,253 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:02:11,253 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:02:11,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:02:11,254 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:02:11,254 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:02:11,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:02:11,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:02:11,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:02:11,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:02:11,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:02:11,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:02:11,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:02:11,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:02:11,256 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:02:11,256 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:02:11,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:02:11,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:02:11,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:02:11,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:02:11,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:02:11,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:02:11,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:02:11,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:02:11,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:02:11,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:02:11,260 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:02:11,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:02:11,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:02:11,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:02:11,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:02:11,261 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_26f83e36-ee93-4fff-89a4-e6aad01f4287/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76a5caa3071fd3b7fdb0794a63eaafb12ee9a50e [2020-11-22 13:02:11,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:02:11,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:02:11,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:02:11,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:02:11,586 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:02:11,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe014_tso.oepc.i [2020-11-22 13:02:11,666 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/data/038914045/3948c3a1f96748e6ad41012ad166d906/FLAGad2b0a034 [2020-11-22 13:02:12,175 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:02:12,176 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/sv-benchmarks/c/pthread-wmm/safe014_tso.oepc.i [2020-11-22 13:02:12,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/data/038914045/3948c3a1f96748e6ad41012ad166d906/FLAGad2b0a034 [2020-11-22 13:02:12,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/data/038914045/3948c3a1f96748e6ad41012ad166d906 [2020-11-22 13:02:12,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:02:12,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:02:12,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:02:12,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:02:12,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:02:12,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:12,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23aa26d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12, skipping insertion in model container [2020-11-22 13:02:12,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:12,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:02:12,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:02:12,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:02:12,879 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:02:12,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:02:12,992 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:02:12,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12 WrapperNode [2020-11-22 13:02:12,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:02:12,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:02:12,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:02:12,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:02:13,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:13,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:13,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:02:13,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:02:13,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:02:13,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:02:13,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:13,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:13,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:13,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:13,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:13,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:13,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... [2020-11-22 13:02:13,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:02:13,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:02:13,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:02:13,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:02:13,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/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 [2020-11-22 13:02:13,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:02:13,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-22 13:02:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:02:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:02:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-22 13:02:13,163 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-22 13:02:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-22 13:02:13,164 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-22 13:02:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-11-22 13:02:13,164 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-11-22 13:02:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:02:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-22 13:02:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:02:13,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:02:13,166 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-22 13:02:13,740 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:02:13,740 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-22 13:02:13,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:02:13 BoogieIcfgContainer [2020-11-22 13:02:13,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:02:13,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:02:13,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:02:13,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:02:13,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:02:12" (1/3) ... [2020-11-22 13:02:13,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63580c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:02:13, skipping insertion in model container [2020-11-22 13:02:13,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:12" (2/3) ... [2020-11-22 13:02:13,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63580c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:02:13, skipping insertion in model container [2020-11-22 13:02:13,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:02:13" (3/3) ... [2020-11-22 13:02:13,752 INFO L111 eAbstractionObserver]: Analyzing ICFG safe014_tso.oepc.i [2020-11-22 13:02:13,763 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 13:02:13,764 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:02:13,769 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:02:13,770 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 13:02:13,798 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,798 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,798 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,798 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,799 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,799 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,800 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,800 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,800 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,800 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,800 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,801 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,801 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,801 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,801 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,802 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,802 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,802 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,804 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,804 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,805 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,805 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,814 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,814 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,815 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,815 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,818 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,818 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,818 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,818 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:02:13,820 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-22 13:02:13,829 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 13:02:13,850 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:02:13,850 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:02:13,850 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:02:13,850 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:02:13,850 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:02:13,851 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:02:13,851 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:02:13,851 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:02:13,862 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 13:02:13,864 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 79 transitions, 173 flow [2020-11-22 13:02:13,867 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 79 transitions, 173 flow [2020-11-22 13:02:13,869 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 79 transitions, 173 flow [2020-11-22 13:02:13,909 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2020-11-22 13:02:13,909 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-22 13:02:13,913 INFO L80 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 76 events. 3/76 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. 0/72 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2020-11-22 13:02:13,916 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2020-11-22 13:02:16,036 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-22 13:02:16,157 INFO L131 LiptonReduction]: Checked pairs total: 2779 [2020-11-22 13:02:16,157 INFO L133 LiptonReduction]: Total number of compositions: 70 [2020-11-22 13:02:16,162 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 61 flow [2020-11-22 13:02:16,195 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 362 states. [2020-11-22 13:02:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states. [2020-11-22 13:02:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:02:16,205 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:16,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:16,206 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:16,216 INFO L82 PathProgramCache]: Analyzing trace with hash -460323677, now seen corresponding path program 1 times [2020-11-22 13:02:16,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:16,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411118265] [2020-11-22 13:02:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:16,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411118265] [2020-11-22 13:02:16,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:16,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:02:16,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472033623] [2020-11-22 13:02:16,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:02:16,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:16,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:02:16,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:02:16,492 INFO L87 Difference]: Start difference. First operand 362 states. Second operand 2 states. [2020-11-22 13:02:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:16,541 INFO L93 Difference]: Finished difference Result 362 states and 1072 transitions. [2020-11-22 13:02:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:02:16,543 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-22 13:02:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:16,580 INFO L225 Difference]: With dead ends: 362 [2020-11-22 13:02:16,581 INFO L226 Difference]: Without dead ends: 298 [2020-11-22 13:02:16,583 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 [2020-11-22 13:02:16,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-22 13:02:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-11-22 13:02:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-11-22 13:02:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 864 transitions. [2020-11-22 13:02:16,657 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 864 transitions. Word has length 8 [2020-11-22 13:02:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:16,658 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 864 transitions. [2020-11-22 13:02:16,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:02:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 864 transitions. [2020-11-22 13:02:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:02:16,660 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:16,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:16,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:02:16,661 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:16,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:16,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1385173359, now seen corresponding path program 1 times [2020-11-22 13:02:16,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:16,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345608352] [2020-11-22 13:02:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:16,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345608352] [2020-11-22 13:02:16,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:16,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:02:16,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948408542] [2020-11-22 13:02:16,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:02:16,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:16,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:02:16,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:02:16,827 INFO L87 Difference]: Start difference. First operand 298 states and 864 transitions. Second operand 5 states. [2020-11-22 13:02:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:16,894 INFO L93 Difference]: Finished difference Result 330 states and 912 transitions. [2020-11-22 13:02:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:02:16,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-22 13:02:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:16,897 INFO L225 Difference]: With dead ends: 330 [2020-11-22 13:02:16,897 INFO L226 Difference]: Without dead ends: 266 [2020-11-22 13:02:16,898 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 [2020-11-22 13:02:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-11-22 13:02:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2020-11-22 13:02:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-11-22 13:02:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 752 transitions. [2020-11-22 13:02:16,922 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 752 transitions. Word has length 9 [2020-11-22 13:02:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:16,923 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 752 transitions. [2020-11-22 13:02:16,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:02:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 752 transitions. [2020-11-22 13:02:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:02:16,928 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:16,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:16,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:02:16,928 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash 585999155, now seen corresponding path program 1 times [2020-11-22 13:02:16,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:16,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273016342] [2020-11-22 13:02:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:17,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273016342] [2020-11-22 13:02:17,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:17,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:02:17,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921736794] [2020-11-22 13:02:17,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:02:17,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:17,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:02:17,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:02:17,065 INFO L87 Difference]: Start difference. First operand 266 states and 752 transitions. Second operand 6 states. [2020-11-22 13:02:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:17,189 INFO L93 Difference]: Finished difference Result 344 states and 924 transitions. [2020-11-22 13:02:17,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:02:17,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-22 13:02:17,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:17,195 INFO L225 Difference]: With dead ends: 344 [2020-11-22 13:02:17,195 INFO L226 Difference]: Without dead ends: 170 [2020-11-22 13:02:17,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:02:17,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-22 13:02:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-11-22 13:02:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-11-22 13:02:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 428 transitions. [2020-11-22 13:02:17,209 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 428 transitions. Word has length 10 [2020-11-22 13:02:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:17,210 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 428 transitions. [2020-11-22 13:02:17,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:02:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 428 transitions. [2020-11-22 13:02:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:02:17,211 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:17,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:17,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:02:17,212 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:17,213 INFO L82 PathProgramCache]: Analyzing trace with hash 229025079, now seen corresponding path program 1 times [2020-11-22 13:02:17,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:17,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805800288] [2020-11-22 13:02:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:17,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805800288] [2020-11-22 13:02:17,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:17,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:02:17,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318465715] [2020-11-22 13:02:17,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:02:17,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:17,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:02:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:02:17,279 INFO L87 Difference]: Start difference. First operand 170 states and 428 transitions. Second operand 4 states. [2020-11-22 13:02:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:17,332 INFO L93 Difference]: Finished difference Result 182 states and 442 transitions. [2020-11-22 13:02:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:02:17,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 13:02:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:17,335 INFO L225 Difference]: With dead ends: 182 [2020-11-22 13:02:17,335 INFO L226 Difference]: Without dead ends: 158 [2020-11-22 13:02:17,335 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 [2020-11-22 13:02:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-22 13:02:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-11-22 13:02:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-22 13:02:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 390 transitions. [2020-11-22 13:02:17,345 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 390 transitions. Word has length 12 [2020-11-22 13:02:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:17,345 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 390 transitions. [2020-11-22 13:02:17,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:02:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 390 transitions. [2020-11-22 13:02:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:02:17,347 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:17,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:17,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:02:17,348 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:17,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1697755731, now seen corresponding path program 1 times [2020-11-22 13:02:17,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:17,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724035247] [2020-11-22 13:02:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:17,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724035247] [2020-11-22 13:02:17,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:17,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:02:17,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61610263] [2020-11-22 13:02:17,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:02:17,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:17,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:02:17,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:02:17,468 INFO L87 Difference]: Start difference. First operand 158 states and 390 transitions. Second operand 7 states. [2020-11-22 13:02:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:17,594 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-11-22 13:02:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:02:17,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-11-22 13:02:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:17,596 INFO L225 Difference]: With dead ends: 172 [2020-11-22 13:02:17,596 INFO L226 Difference]: Without dead ends: 130 [2020-11-22 13:02:17,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:02:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-22 13:02:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-11-22 13:02:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-22 13:02:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 316 transitions. [2020-11-22 13:02:17,605 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 316 transitions. Word has length 13 [2020-11-22 13:02:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:17,605 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 316 transitions. [2020-11-22 13:02:17,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:02:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 316 transitions. [2020-11-22 13:02:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:02:17,607 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:17,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:17,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:02:17,607 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:17,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1286592520, now seen corresponding path program 1 times [2020-11-22 13:02:17,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:17,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237027683] [2020-11-22 13:02:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:17,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237027683] [2020-11-22 13:02:17,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:17,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:02:17,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964464195] [2020-11-22 13:02:17,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:02:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:02:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:02:17,686 INFO L87 Difference]: Start difference. First operand 128 states and 316 transitions. Second operand 4 states. [2020-11-22 13:02:17,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:17,722 INFO L93 Difference]: Finished difference Result 134 states and 317 transitions. [2020-11-22 13:02:17,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:02:17,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-22 13:02:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:17,724 INFO L225 Difference]: With dead ends: 134 [2020-11-22 13:02:17,724 INFO L226 Difference]: Without dead ends: 116 [2020-11-22 13:02:17,725 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 [2020-11-22 13:02:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-22 13:02:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-11-22 13:02:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-11-22 13:02:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 278 transitions. [2020-11-22 13:02:17,733 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 278 transitions. Word has length 13 [2020-11-22 13:02:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:17,733 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 278 transitions. [2020-11-22 13:02:17,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:02:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 278 transitions. [2020-11-22 13:02:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:02:17,735 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:17,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:17,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:02:17,735 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:17,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1405608924, now seen corresponding path program 1 times [2020-11-22 13:02:17,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:17,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184219176] [2020-11-22 13:02:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:17,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184219176] [2020-11-22 13:02:17,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:17,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:02:17,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975469783] [2020-11-22 13:02:17,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:02:17,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:17,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:02:17,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:02:17,804 INFO L87 Difference]: Start difference. First operand 116 states and 278 transitions. Second operand 4 states. [2020-11-22 13:02:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:17,831 INFO L93 Difference]: Finished difference Result 137 states and 301 transitions. [2020-11-22 13:02:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:02:17,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-22 13:02:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:17,833 INFO L225 Difference]: With dead ends: 137 [2020-11-22 13:02:17,833 INFO L226 Difference]: Without dead ends: 97 [2020-11-22 13:02:17,834 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 [2020-11-22 13:02:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-22 13:02:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-11-22 13:02:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-22 13:02:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 208 transitions. [2020-11-22 13:02:17,838 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 208 transitions. Word has length 14 [2020-11-22 13:02:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:17,838 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 208 transitions. [2020-11-22 13:02:17,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:02:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 208 transitions. [2020-11-22 13:02:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:02:17,839 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:17,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:17,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:02:17,840 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash -27259733, now seen corresponding path program 1 times [2020-11-22 13:02:17,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:17,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624083008] [2020-11-22 13:02:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:17,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624083008] [2020-11-22 13:02:17,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:17,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:02:17,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032625203] [2020-11-22 13:02:17,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:02:17,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:02:17,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:02:17,907 INFO L87 Difference]: Start difference. First operand 97 states and 208 transitions. Second operand 5 states. [2020-11-22 13:02:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:17,958 INFO L93 Difference]: Finished difference Result 95 states and 185 transitions. [2020-11-22 13:02:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:02:17,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-22 13:02:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:17,959 INFO L225 Difference]: With dead ends: 95 [2020-11-22 13:02:17,959 INFO L226 Difference]: Without dead ends: 70 [2020-11-22 13:02:17,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:02:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-22 13:02:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-11-22 13:02:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-22 13:02:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-11-22 13:02:17,962 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 15 [2020-11-22 13:02:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:17,962 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-11-22 13:02:17,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:02:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-11-22 13:02:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:02:17,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:17,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:17,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:02:17,963 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:17,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:17,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1628487690, now seen corresponding path program 1 times [2020-11-22 13:02:17,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:17,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524222066] [2020-11-22 13:02:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:18,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524222066] [2020-11-22 13:02:18,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:18,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:02:18,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275581796] [2020-11-22 13:02:18,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:02:18,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:18,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:02:18,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:02:18,039 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 6 states. [2020-11-22 13:02:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:18,119 INFO L93 Difference]: Finished difference Result 63 states and 113 transitions. [2020-11-22 13:02:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:02:18,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-22 13:02:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:18,121 INFO L225 Difference]: With dead ends: 63 [2020-11-22 13:02:18,121 INFO L226 Difference]: Without dead ends: 55 [2020-11-22 13:02:18,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:02:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-22 13:02:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-22 13:02:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-22 13:02:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 99 transitions. [2020-11-22 13:02:18,125 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 99 transitions. Word has length 16 [2020-11-22 13:02:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:18,125 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 99 transitions. [2020-11-22 13:02:18,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:02:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 99 transitions. [2020-11-22 13:02:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:02:18,126 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:18,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:18,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:02:18,126 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:18,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1397206146, now seen corresponding path program 1 times [2020-11-22 13:02:18,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:18,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843006824] [2020-11-22 13:02:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:18,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843006824] [2020-11-22 13:02:18,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:18,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:02:18,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641834743] [2020-11-22 13:02:18,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:02:18,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:18,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:02:18,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:02:18,234 INFO L87 Difference]: Start difference. First operand 55 states and 99 transitions. Second operand 5 states. [2020-11-22 13:02:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:18,271 INFO L93 Difference]: Finished difference Result 65 states and 113 transitions. [2020-11-22 13:02:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:02:18,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-22 13:02:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:18,272 INFO L225 Difference]: With dead ends: 65 [2020-11-22 13:02:18,272 INFO L226 Difference]: Without dead ends: 39 [2020-11-22 13:02:18,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:02:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-22 13:02:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-22 13:02:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-22 13:02:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 63 transitions. [2020-11-22 13:02:18,274 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 63 transitions. Word has length 18 [2020-11-22 13:02:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:18,274 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 63 transitions. [2020-11-22 13:02:18,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:02:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 63 transitions. [2020-11-22 13:02:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:02:18,275 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:18,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:18,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:02:18,276 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:18,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1171950116, now seen corresponding path program 2 times [2020-11-22 13:02:18,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:18,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666461873] [2020-11-22 13:02:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:18,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666461873] [2020-11-22 13:02:18,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:18,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:02:18,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173545293] [2020-11-22 13:02:18,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:02:18,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:18,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:02:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:02:18,355 INFO L87 Difference]: Start difference. First operand 39 states and 63 transitions. Second operand 5 states. [2020-11-22 13:02:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:18,391 INFO L93 Difference]: Finished difference Result 53 states and 85 transitions. [2020-11-22 13:02:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:02:18,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-22 13:02:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:18,393 INFO L225 Difference]: With dead ends: 53 [2020-11-22 13:02:18,393 INFO L226 Difference]: Without dead ends: 31 [2020-11-22 13:02:18,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:02:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-22 13:02:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-22 13:02:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:02:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-11-22 13:02:18,395 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 18 [2020-11-22 13:02:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:18,395 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-11-22 13:02:18,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:02:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-11-22 13:02:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:02:18,396 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:18,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:18,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:02:18,399 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:18,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1333208262, now seen corresponding path program 3 times [2020-11-22 13:02:18,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:18,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379511183] [2020-11-22 13:02:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:18,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379511183] [2020-11-22 13:02:18,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:18,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:02:18,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878386550] [2020-11-22 13:02:18,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:02:18,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:18,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:02:18,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:02:18,458 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 5 states. [2020-11-22 13:02:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:18,486 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2020-11-22 13:02:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:02:18,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-22 13:02:18,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:18,487 INFO L225 Difference]: With dead ends: 30 [2020-11-22 13:02:18,487 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:02:18,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:02:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:02:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:02:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:02:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:02:18,488 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-11-22 13:02:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:18,489 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:02:18,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:02:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:02:18,489 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:02:18,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-22 13:02:18,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:02:18 BasicIcfg [2020-11-22 13:02:18,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:02:18,493 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:02:18,493 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:02:18,493 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:02:18,493 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:02:13" (3/4) ... [2020-11-22 13:02:18,496 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:02:18,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-22 13:02:18,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-22 13:02:18,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-11-22 13:02:18,507 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-22 13:02:18,507 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 13:02:18,508 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:02:18,508 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:02:18,579 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_26f83e36-ee93-4fff-89a4-e6aad01f4287/bin/utaipan/witness.graphml [2020-11-22 13:02:18,579 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:02:18,581 INFO L168 Benchmark]: Toolchain (without parser) took 6120.42 ms. Allocated memory was 90.2 MB in the beginning and 144.7 MB in the end (delta: 54.5 MB). Free memory was 56.7 MB in the beginning and 79.4 MB in the end (delta: -22.7 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:18,582 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory was 50.4 MB in the beginning and 50.3 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:02:18,582 INFO L168 Benchmark]: CACSL2BoogieTranslator took 529.89 ms. Allocated memory is still 90.2 MB. Free memory was 56.5 MB in the beginning and 46.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:18,583 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.31 ms. Allocated memory is still 90.2 MB. Free memory was 46.1 MB in the beginning and 44.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:18,583 INFO L168 Benchmark]: Boogie Preprocessor took 25.51 ms. Allocated memory is still 90.2 MB. Free memory was 44.0 MB in the beginning and 43.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:02:18,583 INFO L168 Benchmark]: RCFGBuilder took 678.76 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 42.6 MB in the beginning and 73.2 MB in the end (delta: -30.5 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:18,584 INFO L168 Benchmark]: TraceAbstraction took 4747.43 ms. Allocated memory was 111.1 MB in the beginning and 144.7 MB in the end (delta: 33.6 MB). Free memory was 73.2 MB in the beginning and 82.5 MB in the end (delta: -9.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:18,586 INFO L168 Benchmark]: Witness Printer took 86.81 ms. Allocated memory is still 144.7 MB. Free memory was 82.5 MB in the beginning and 79.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:18,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory was 50.4 MB in the beginning and 50.3 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 529.89 ms. Allocated memory is still 90.2 MB. Free memory was 56.5 MB in the beginning and 46.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.31 ms. Allocated memory is still 90.2 MB. Free memory was 46.1 MB in the beginning and 44.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.51 ms. Allocated memory is still 90.2 MB. Free memory was 44.0 MB in the beginning and 43.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 678.76 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 42.6 MB in the beginning and 73.2 MB in the end (delta: -30.5 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4747.43 ms. Allocated memory was 111.1 MB in the beginning and 144.7 MB in the end (delta: 33.6 MB). Free memory was 73.2 MB in the beginning and 82.5 MB in the end (delta: -9.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 16.1 GB. * Witness Printer took 86.81 ms. Allocated memory is still 144.7 MB. Free memory was 82.5 MB in the beginning and 79.4 MB in the end (delta: 3.1 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 962 VarBasedMoverChecksPositive, 32 VarBasedMoverChecksNegative, 6 SemBasedMoverChecksPositive, 26 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 66 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.2s, 86 PlacesBefore, 32 PlacesAfterwards, 79 TransitionsBefore, 23 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 70 TotalNumberOfCompositions, 2779 MoverChecksTotal - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 12, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 228 SDtfs, 325 SDslu, 408 SDs, 0 SdLazy, 222 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s 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, 12 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 6560 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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...