./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe012_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_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe012_tso.oepc.i -s /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/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 c368bf714b2a378b5c407501fad688f5c7e62a21 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:57:02,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:57:02,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:57:03,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:57:03,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:57:03,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:57:03,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:57:03,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:57:03,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:57:03,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:57:03,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:57:03,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:57:03,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:57:03,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:57:03,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:57:03,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:57:03,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:57:03,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:57:03,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:57:03,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:57:03,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:57:03,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:57:03,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:57:03,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:57:03,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:57:03,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:57:03,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:57:03,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:57:03,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:57:03,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:57:03,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:57:03,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:57:03,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:57:03,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:57:03,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:57:03,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:57:03,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:57:03,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:57:03,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:57:03,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:57:03,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:57:03,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:57:03,187 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:57:03,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:57:03,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:57:03,190 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:57:03,190 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:57:03,190 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:57:03,191 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:57:03,191 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:57:03,191 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:57:03,191 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:57:03,193 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:57:03,193 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:57:03,193 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:57:03,194 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:57:03,194 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:57:03,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:57:03,195 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:57:03,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:57:03,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:57:03,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:57:03,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:57:03,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:57:03,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:57:03,197 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:57:03,197 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:57:03,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:57:03,198 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:57:03,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:57:03,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:57:03,199 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:57:03,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:57:03,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:57:03,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:57:03,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:57:03,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:57:03,200 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:57:03,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:57:03,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:57:03,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:57:03,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:57:03,202 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_599e1466-3367-4282-8a3e-51b717d86e3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c368bf714b2a378b5c407501fad688f5c7e62a21 [2020-11-22 12:57:03,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:57:03,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:57:03,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:57:03,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:57:03,605 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:57:03,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe012_tso.oepc.i [2020-11-22 12:57:03,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/data/2c6d634a2/13ad2ec4b6c344929525dbef8bd9bd9b/FLAG017bf867d [2020-11-22 12:57:04,357 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:57:04,362 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/sv-benchmarks/c/pthread-wmm/safe012_tso.oepc.i [2020-11-22 12:57:04,390 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/data/2c6d634a2/13ad2ec4b6c344929525dbef8bd9bd9b/FLAG017bf867d [2020-11-22 12:57:04,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/data/2c6d634a2/13ad2ec4b6c344929525dbef8bd9bd9b [2020-11-22 12:57:04,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:57:04,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:57:04,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:04,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:57:04,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:57:04,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:04" (1/1) ... [2020-11-22 12:57:04,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d387602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:04, skipping insertion in model container [2020-11-22 12:57:04,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:04" (1/1) ... [2020-11-22 12:57:04,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:57:04,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:57:05,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:05,156 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:57:05,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:05,306 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:57:05,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05 WrapperNode [2020-11-22 12:57:05,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:05,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:05,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:57:05,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:57:05,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... [2020-11-22 12:57:05,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... [2020-11-22 12:57:05,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:05,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:57:05,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:57:05,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:57:05,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... [2020-11-22 12:57:05,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... [2020-11-22 12:57:05,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... [2020-11-22 12:57:05,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... [2020-11-22 12:57:05,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... [2020-11-22 12:57:05,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... [2020-11-22 12:57:05,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... [2020-11-22 12:57:05,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:57:05,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:57:05,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:57:05,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:57:05,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/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 12:57:05,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:57:05,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-22 12:57:05,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:57:05,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:57:05,510 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-22 12:57:05,511 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-22 12:57:05,511 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-22 12:57:05,511 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-22 12:57:05,511 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-11-22 12:57:05,511 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-11-22 12:57:05,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:57:05,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-22 12:57:05,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:57:05,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:57:05,513 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 12:57:06,097 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:57:06,099 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-22 12:57:06,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:06 BoogieIcfgContainer [2020-11-22 12:57:06,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:57:06,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:57:06,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:57:06,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:57:06,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:57:04" (1/3) ... [2020-11-22 12:57:06,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ddd039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:06, skipping insertion in model container [2020-11-22 12:57:06,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:05" (2/3) ... [2020-11-22 12:57:06,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ddd039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:06, skipping insertion in model container [2020-11-22 12:57:06,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:06" (3/3) ... [2020-11-22 12:57:06,111 INFO L111 eAbstractionObserver]: Analyzing ICFG safe012_tso.oepc.i [2020-11-22 12:57:06,122 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 12:57:06,122 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:57:06,128 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:57:06,129 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 12:57:06,158 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,158 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,159 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,159 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,159 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,160 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,160 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,160 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,160 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,161 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,161 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,161 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,162 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,162 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,162 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,162 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,163 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,163 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,165 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,165 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,166 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,166 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,171 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,171 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,172 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,172 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,175 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,175 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,175 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,176 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:06,178 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-22 12:57:06,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 12:57:06,209 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:57:06,209 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:57:06,210 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:57:06,210 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:57:06,210 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:57:06,210 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:57:06,210 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:57:06,210 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:57:06,221 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 12:57:06,223 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 80 transitions, 175 flow [2020-11-22 12:57:06,226 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 80 transitions, 175 flow [2020-11-22 12:57:06,227 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 87 places, 80 transitions, 175 flow [2020-11-22 12:57:06,272 INFO L129 PetriNetUnfolder]: 3/77 cut-off events. [2020-11-22 12:57:06,272 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-22 12:57:06,276 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 3/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2020-11-22 12:57:06,279 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2020-11-22 12:57:08,007 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-22 12:57:08,536 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-11-22 12:57:09,143 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-11-22 12:57:09,277 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-22 12:57:09,429 INFO L131 LiptonReduction]: Checked pairs total: 2810 [2020-11-22 12:57:09,430 INFO L133 LiptonReduction]: Total number of compositions: 73 [2020-11-22 12:57:09,435 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-11-22 12:57:09,485 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 298 states. [2020-11-22 12:57:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states. [2020-11-22 12:57:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:57:09,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:09,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:09,495 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:09,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:09,501 INFO L82 PathProgramCache]: Analyzing trace with hash -853874994, now seen corresponding path program 1 times [2020-11-22 12:57:09,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:09,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116231033] [2020-11-22 12:57:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:09,782 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 12:57:09,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116231033] [2020-11-22 12:57:09,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:09,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:57:09,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663778098] [2020-11-22 12:57:09,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:57:09,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:09,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:57:09,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:09,813 INFO L87 Difference]: Start difference. First operand 298 states. Second operand 3 states. [2020-11-22 12:57:09,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:09,878 INFO L93 Difference]: Finished difference Result 282 states and 808 transitions. [2020-11-22 12:57:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:57:09,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-22 12:57:09,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:09,900 INFO L225 Difference]: With dead ends: 282 [2020-11-22 12:57:09,901 INFO L226 Difference]: Without dead ends: 218 [2020-11-22 12:57:09,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-22 12:57:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-11-22 12:57:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-11-22 12:57:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 600 transitions. [2020-11-22 12:57:10,003 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 600 transitions. Word has length 8 [2020-11-22 12:57:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:10,004 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 600 transitions. [2020-11-22 12:57:10,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:57:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 600 transitions. [2020-11-22 12:57:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 12:57:10,013 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:10,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:10,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:57:10,014 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash -700352928, now seen corresponding path program 1 times [2020-11-22 12:57:10,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:10,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577354583] [2020-11-22 12:57:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:10,106 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 12:57:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577354583] [2020-11-22 12:57:10,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:10,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:10,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952288739] [2020-11-22 12:57:10,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:57:10,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:57:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:57:10,110 INFO L87 Difference]: Start difference. First operand 218 states and 600 transitions. Second operand 4 states. [2020-11-22 12:57:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:10,143 INFO L93 Difference]: Finished difference Result 242 states and 634 transitions. [2020-11-22 12:57:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:57:10,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 12:57:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:10,146 INFO L225 Difference]: With dead ends: 242 [2020-11-22 12:57:10,146 INFO L226 Difference]: Without dead ends: 146 [2020-11-22 12:57:10,147 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 12:57:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-22 12:57:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-11-22 12:57:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-22 12:57:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-11-22 12:57:10,165 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 9 [2020-11-22 12:57:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:10,166 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-11-22 12:57:10,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:57:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-11-22 12:57:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 12:57:10,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:10,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:10,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:57:10,168 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2063010818, now seen corresponding path program 1 times [2020-11-22 12:57:10,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:10,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768213186] [2020-11-22 12:57:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:10,266 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 12:57:10,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768213186] [2020-11-22 12:57:10,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:10,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:57:10,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536502723] [2020-11-22 12:57:10,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:57:10,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:10,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:57:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:10,269 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 3 states. [2020-11-22 12:57:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:10,280 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-11-22 12:57:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:57:10,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-22 12:57:10,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:10,283 INFO L225 Difference]: With dead ends: 140 [2020-11-22 12:57:10,283 INFO L226 Difference]: Without dead ends: 140 [2020-11-22 12:57:10,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-22 12:57:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-11-22 12:57:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-22 12:57:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 343 transitions. [2020-11-22 12:57:10,293 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 343 transitions. Word has length 11 [2020-11-22 12:57:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:10,294 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 343 transitions. [2020-11-22 12:57:10,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:57:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 343 transitions. [2020-11-22 12:57:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:57:10,295 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:10,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:10,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:57:10,299 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:10,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:10,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1374781277, now seen corresponding path program 1 times [2020-11-22 12:57:10,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:10,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087480129] [2020-11-22 12:57:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:10,387 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 12:57:10,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087480129] [2020-11-22 12:57:10,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:10,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:10,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959512193] [2020-11-22 12:57:10,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:57:10,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:57:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:57:10,390 INFO L87 Difference]: Start difference. First operand 140 states and 343 transitions. Second operand 4 states. [2020-11-22 12:57:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:10,412 INFO L93 Difference]: Finished difference Result 158 states and 376 transitions. [2020-11-22 12:57:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:57:10,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 12:57:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:10,416 INFO L225 Difference]: With dead ends: 158 [2020-11-22 12:57:10,416 INFO L226 Difference]: Without dead ends: 68 [2020-11-22 12:57:10,416 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 12:57:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-22 12:57:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-22 12:57:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-22 12:57:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 144 transitions. [2020-11-22 12:57:10,421 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 144 transitions. Word has length 12 [2020-11-22 12:57:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:10,422 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 144 transitions. [2020-11-22 12:57:10,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:57:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 144 transitions. [2020-11-22 12:57:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:57:10,423 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:10,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:10,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:57:10,423 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:10,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1721558133, now seen corresponding path program 1 times [2020-11-22 12:57:10,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:10,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333233448] [2020-11-22 12:57:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:10,542 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 12:57:10,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333233448] [2020-11-22 12:57:10,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:10,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:10,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62609651] [2020-11-22 12:57:10,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:57:10,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:57:10,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:57:10,544 INFO L87 Difference]: Start difference. First operand 68 states and 144 transitions. Second operand 4 states. [2020-11-22 12:57:10,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:10,577 INFO L93 Difference]: Finished difference Result 81 states and 157 transitions. [2020-11-22 12:57:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:10,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-22 12:57:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:10,578 INFO L225 Difference]: With dead ends: 81 [2020-11-22 12:57:10,578 INFO L226 Difference]: Without dead ends: 59 [2020-11-22 12:57:10,579 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 12:57:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-22 12:57:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-22 12:57:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-22 12:57:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 114 transitions. [2020-11-22 12:57:10,583 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 114 transitions. Word has length 13 [2020-11-22 12:57:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:10,583 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 114 transitions. [2020-11-22 12:57:10,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:57:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 114 transitions. [2020-11-22 12:57:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 12:57:10,584 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:10,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:10,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:57:10,585 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1881599875, now seen corresponding path program 1 times [2020-11-22 12:57:10,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:10,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48811092] [2020-11-22 12:57:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:10,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48811092] [2020-11-22 12:57:10,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:10,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:10,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572779784] [2020-11-22 12:57:10,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:57:10,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:10,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:57:10,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:10,725 INFO L87 Difference]: Start difference. First operand 59 states and 114 transitions. Second operand 5 states. [2020-11-22 12:57:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:10,806 INFO L93 Difference]: Finished difference Result 60 states and 104 transitions. [2020-11-22 12:57:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:57:10,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-22 12:57:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:10,809 INFO L225 Difference]: With dead ends: 60 [2020-11-22 12:57:10,809 INFO L226 Difference]: Without dead ends: 45 [2020-11-22 12:57:10,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:57:10,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-22 12:57:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-22 12:57:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-22 12:57:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2020-11-22 12:57:10,812 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 14 [2020-11-22 12:57:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:10,812 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2020-11-22 12:57:10,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:57:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2020-11-22 12:57:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 12:57:10,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:10,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:10,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 12:57:10,813 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1799830367, now seen corresponding path program 1 times [2020-11-22 12:57:10,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:10,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030489167] [2020-11-22 12:57:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:10,934 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 12:57:10,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030489167] [2020-11-22 12:57:10,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:10,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:57:10,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195335468] [2020-11-22 12:57:10,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:57:10,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:10,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:57:10,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:57:10,936 INFO L87 Difference]: Start difference. First operand 45 states and 74 transitions. Second operand 6 states. [2020-11-22 12:57:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:11,008 INFO L93 Difference]: Finished difference Result 42 states and 66 transitions. [2020-11-22 12:57:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:57:11,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-22 12:57:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:11,009 INFO L225 Difference]: With dead ends: 42 [2020-11-22 12:57:11,009 INFO L226 Difference]: Without dead ends: 36 [2020-11-22 12:57:11,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:57:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-22 12:57:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-22 12:57:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-22 12:57:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 56 transitions. [2020-11-22 12:57:11,011 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 56 transitions. Word has length 15 [2020-11-22 12:57:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:11,012 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 56 transitions. [2020-11-22 12:57:11,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:57:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 56 transitions. [2020-11-22 12:57:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 12:57:11,012 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:11,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:11,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 12:57:11,012 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1269131745, now seen corresponding path program 1 times [2020-11-22 12:57:11,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:11,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803489790] [2020-11-22 12:57:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:11,079 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 12:57:11,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803489790] [2020-11-22 12:57:11,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:11,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:11,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852929312] [2020-11-22 12:57:11,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:57:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:11,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:57:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:57:11,081 INFO L87 Difference]: Start difference. First operand 36 states and 56 transitions. Second operand 4 states. [2020-11-22 12:57:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:11,101 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2020-11-22 12:57:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:57:11,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-22 12:57:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:11,102 INFO L225 Difference]: With dead ends: 35 [2020-11-22 12:57:11,102 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:57:11,102 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 12:57:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:57:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:57:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:57:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:57:11,103 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-22 12:57:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:11,103 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:57:11,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:57:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:57:11,103 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:57:11,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 12:57:11,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:57:11 BasicIcfg [2020-11-22 12:57:11,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:57:11,107 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:57:11,107 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:57:11,107 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:57:11,108 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:06" (3/4) ... [2020-11-22 12:57:11,110 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:57:11,117 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-22 12:57:11,117 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-22 12:57:11,117 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-11-22 12:57:11,125 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-22 12:57:11,125 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:57:11,125 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:57:11,125 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:57:11,212 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_599e1466-3367-4282-8a3e-51b717d86e3a/bin/utaipan/witness.graphml [2020-11-22 12:57:11,212 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:57:11,213 INFO L168 Benchmark]: Toolchain (without parser) took 6627.80 ms. Allocated memory was 86.0 MB in the beginning and 151.0 MB in the end (delta: 65.0 MB). Free memory was 51.7 MB in the beginning and 86.7 MB in the end (delta: -35.1 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:11,214 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory was 58.5 MB in the beginning and 58.5 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:57:11,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 716.58 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 51.5 MB in the beginning and 60.9 MB in the end (delta: -9.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:11,215 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.51 ms. Allocated memory is still 104.9 MB. Free memory was 60.9 MB in the beginning and 59.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:11,215 INFO L168 Benchmark]: Boogie Preprocessor took 52.57 ms. Allocated memory is still 104.9 MB. Free memory was 59.1 MB in the beginning and 57.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:57:11,216 INFO L168 Benchmark]: RCFGBuilder took 679.36 ms. Allocated memory is still 104.9 MB. Free memory was 57.5 MB in the beginning and 63.3 MB in the end (delta: -5.8 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:11,216 INFO L168 Benchmark]: TraceAbstraction took 5001.98 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 63.3 MB in the beginning and 88.8 MB in the end (delta: -25.5 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:11,217 INFO L168 Benchmark]: Witness Printer took 105.32 ms. Allocated memory is still 151.0 MB. Free memory was 88.8 MB in the beginning and 86.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:11,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory was 58.5 MB in the beginning and 58.5 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 716.58 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 51.5 MB in the beginning and 60.9 MB in the end (delta: -9.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.51 ms. Allocated memory is still 104.9 MB. Free memory was 60.9 MB in the beginning and 59.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.57 ms. Allocated memory is still 104.9 MB. Free memory was 59.1 MB in the beginning and 57.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 679.36 ms. Allocated memory is still 104.9 MB. Free memory was 57.5 MB in the beginning and 63.3 MB in the end (delta: -5.8 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5001.98 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 63.3 MB in the beginning and 88.8 MB in the end (delta: -25.5 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. * Witness Printer took 105.32 ms. Allocated memory is still 151.0 MB. Free memory was 88.8 MB in the beginning and 86.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1064 VarBasedMoverChecksPositive, 47 VarBasedMoverChecksNegative, 10 SemBasedMoverChecksPositive, 37 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 90 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.2s, 87 PlacesBefore, 31 PlacesAfterwards, 80 TransitionsBefore, 22 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 73 TotalNumberOfCompositions, 2810 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, 78 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.2s, HoareTripleCheckerStatistics: 136 SDtfs, 121 SDslu, 149 SDs, 0 SdLazy, 97 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 3385 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...