./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe010_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe010_tso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/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 d7b99eb0691db756f3c08dc52ba10dd69081a5de ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 10:18:42,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:18:42,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:18:42,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:18:42,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:18:42,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:18:42,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:18:42,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:18:42,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:18:42,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:18:42,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:18:42,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:18:42,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:18:42,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:18:42,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:18:42,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:18:42,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:18:42,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:18:42,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:18:42,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:18:42,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:18:42,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:18:42,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:18:42,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:18:42,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:18:42,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:18:42,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:18:42,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:18:42,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:18:42,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:18:42,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:18:42,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:18:42,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:18:42,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:18:42,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:18:42,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:18:42,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:18:42,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:18:42,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:18:42,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:18:42,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:18:42,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:18:42,166 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:18:42,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:18:42,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:18:42,167 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:18:42,167 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:18:42,167 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:18:42,167 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:18:42,167 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:18:42,167 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:18:42,168 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:18:42,168 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:18:42,168 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:18:42,168 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:18:42,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:18:42,168 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:18:42,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:18:42,169 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:18:42,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:18:42,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:18:42,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:18:42,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:18:42,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:18:42,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:18:42,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:18:42,170 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:18:42,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:18:42,170 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:18:42,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:18:42,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:18:42,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:18:42,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:18:42,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:18:42,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:18:42,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:18:42,171 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:18:42,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:18:42,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:18:42,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:18:42,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:18:42,172 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_9ac72784-5b8c-4c15-a129-5d6a682c8906/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b99eb0691db756f3c08dc52ba10dd69081a5de [2020-12-09 10:18:42,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:18:42,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:18:42,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:18:42,380 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:18:42,381 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:18:42,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe010_tso.opt.i [2020-12-09 10:18:42,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/data/6c7bb74e9/764d0ff4ad73408f8e8d62384096d45a/FLAG8799aed59 [2020-12-09 10:18:42,815 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:18:42,815 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/sv-benchmarks/c/pthread-wmm/safe010_tso.opt.i [2020-12-09 10:18:42,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/data/6c7bb74e9/764d0ff4ad73408f8e8d62384096d45a/FLAG8799aed59 [2020-12-09 10:18:43,226 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/data/6c7bb74e9/764d0ff4ad73408f8e8d62384096d45a [2020-12-09 10:18:43,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:18:43,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:18:43,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:18:43,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:18:43,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:18:43,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c3d576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43, skipping insertion in model container [2020-12-09 10:18:43,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:18:43,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:18:43,374 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/sv-benchmarks/c/pthread-wmm/safe010_tso.opt.i[949,962] [2020-12-09 10:18:43,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:18:43,469 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:18:43,477 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/sv-benchmarks/c/pthread-wmm/safe010_tso.opt.i[949,962] [2020-12-09 10:18:43,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:18:43,544 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:18:43,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43 WrapperNode [2020-12-09 10:18:43,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:18:43,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:18:43,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:18:43,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:18:43,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:18:43,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:18:43,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:18:43,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:18:43,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... [2020-12-09 10:18:43,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:18:43,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:18:43,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:18:43,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:18:43,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:18:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 10:18:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 10:18:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:18:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 10:18:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 10:18:43,658 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 10:18:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 10:18:43,658 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 10:18:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:18:43,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 10:18:43,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:18:43,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:18:43,660 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-09 10:18:43,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:18:43,843 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 10:18:43,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:18:43 BoogieIcfgContainer [2020-12-09 10:18:43,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:18:43,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:18:43,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:18:43,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:18:43,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:18:43" (1/3) ... [2020-12-09 10:18:43,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e9b475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:18:43, skipping insertion in model container [2020-12-09 10:18:43,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:18:43" (2/3) ... [2020-12-09 10:18:43,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e9b475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:18:43, skipping insertion in model container [2020-12-09 10:18:43,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:18:43" (3/3) ... [2020-12-09 10:18:43,850 INFO L111 eAbstractionObserver]: Analyzing ICFG safe010_tso.opt.i [2020-12-09 10:18:43,861 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 10:18:43,861 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:18:43,863 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:18:43,864 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 10:18:43,888 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,888 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,888 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,888 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,888 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,889 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,889 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,889 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,890 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,890 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,890 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,890 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,891 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,891 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,891 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,891 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,891 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,891 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,892 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,892 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,892 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,892 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,893 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,893 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,895 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,895 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,895 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,896 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,900 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,900 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,900 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,900 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:18:43,902 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 10:18:43,910 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 10:18:43,924 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:18:43,924 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:18:43,924 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:18:43,924 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:18:43,924 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:18:43,924 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:18:43,924 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:18:43,924 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:18:43,932 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 10:18:43,933 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 60 transitions, 130 flow [2020-12-09 10:18:43,940 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 60 transitions, 130 flow [2020-12-09 10:18:43,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 60 transitions, 130 flow [2020-12-09 10:18:43,978 INFO L129 PetriNetUnfolder]: 2/58 cut-off events. [2020-12-09 10:18:43,978 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 10:18:43,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 2/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2020-12-09 10:18:43,984 INFO L116 LiptonReduction]: Number of co-enabled transitions 696 [2020-12-09 10:18:45,616 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-09 10:18:45,795 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-09 10:18:45,858 INFO L131 LiptonReduction]: Checked pairs total: 1378 [2020-12-09 10:18:45,858 INFO L133 LiptonReduction]: Total number of compositions: 55 [2020-12-09 10:18:45,862 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 16 transitions, 42 flow [2020-12-09 10:18:45,869 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 74 states. [2020-12-09 10:18:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-12-09 10:18:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 10:18:45,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:18:45,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 10:18:45,874 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:18:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:18:45,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1925010784, now seen corresponding path program 1 times [2020-12-09 10:18:45,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:18:45,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615241776] [2020-12-09 10:18:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:18:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:18:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:18:46,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615241776] [2020-12-09 10:18:46,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:18:46,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 10:18:46,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299141115] [2020-12-09 10:18:46,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:18:46,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:18:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:18:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:18:46,040 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 3 states. [2020-12-09 10:18:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:18:46,061 INFO L93 Difference]: Finished difference Result 104 states and 207 transitions. [2020-12-09 10:18:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:18:46,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 10:18:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:18:46,068 INFO L225 Difference]: With dead ends: 104 [2020-12-09 10:18:46,068 INFO L226 Difference]: Without dead ends: 63 [2020-12-09 10:18:46,069 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 [2020-12-09 10:18:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-09 10:18:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-12-09 10:18:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 10:18:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 109 transitions. [2020-12-09 10:18:46,093 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 109 transitions. Word has length 6 [2020-12-09 10:18:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:18:46,094 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 109 transitions. [2020-12-09 10:18:46,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:18:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 109 transitions. [2020-12-09 10:18:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 10:18:46,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:18:46,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:18:46,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:18:46,095 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:18:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:18:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash 454629136, now seen corresponding path program 1 times [2020-12-09 10:18:46,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:18:46,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944757020] [2020-12-09 10:18:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:18:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:18:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:18:46,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944757020] [2020-12-09 10:18:46,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:18:46,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 10:18:46,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640874898] [2020-12-09 10:18:46,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:18:46,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:18:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:18:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:18:46,162 INFO L87 Difference]: Start difference. First operand 57 states and 109 transitions. Second operand 3 states. [2020-12-09 10:18:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:18:46,168 INFO L93 Difference]: Finished difference Result 54 states and 101 transitions. [2020-12-09 10:18:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:18:46,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 10:18:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:18:46,169 INFO L225 Difference]: With dead ends: 54 [2020-12-09 10:18:46,169 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 10:18:46,170 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 [2020-12-09 10:18:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 10:18:46,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-09 10:18:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 10:18:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 101 transitions. [2020-12-09 10:18:46,178 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 101 transitions. Word has length 7 [2020-12-09 10:18:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:18:46,178 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 101 transitions. [2020-12-09 10:18:46,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:18:46,178 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 101 transitions. [2020-12-09 10:18:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 10:18:46,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:18:46,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:18:46,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 10:18:46,179 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:18:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:18:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash 454206947, now seen corresponding path program 1 times [2020-12-09 10:18:46,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:18:46,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792561091] [2020-12-09 10:18:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:18:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:18:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:18:46,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792561091] [2020-12-09 10:18:46,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:18:46,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:18:46,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48970767] [2020-12-09 10:18:46,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:18:46,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:18:46,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:18:46,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:18:46,237 INFO L87 Difference]: Start difference. First operand 54 states and 101 transitions. Second operand 4 states. [2020-12-09 10:18:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:18:46,252 INFO L93 Difference]: Finished difference Result 57 states and 102 transitions. [2020-12-09 10:18:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:18:46,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 10:18:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:18:46,253 INFO L225 Difference]: With dead ends: 57 [2020-12-09 10:18:46,253 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 10:18:46,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:18:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 10:18:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-12-09 10:18:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 10:18:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 95 transitions. [2020-12-09 10:18:46,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 95 transitions. Word has length 7 [2020-12-09 10:18:46,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:18:46,261 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 95 transitions. [2020-12-09 10:18:46,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:18:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 95 transitions. [2020-12-09 10:18:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 10:18:46,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:18:46,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:18:46,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 10:18:46,262 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:18:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:18:46,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1208600435, now seen corresponding path program 1 times [2020-12-09 10:18:46,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:18:46,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907234477] [2020-12-09 10:18:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:18:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:18:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:18:46,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907234477] [2020-12-09 10:18:46,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:18:46,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:18:46,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690453905] [2020-12-09 10:18:46,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:18:46,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:18:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:18:46,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:18:46,310 INFO L87 Difference]: Start difference. First operand 51 states and 95 transitions. Second operand 4 states. [2020-12-09 10:18:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:18:46,335 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2020-12-09 10:18:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:18:46,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 10:18:46,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:18:46,336 INFO L225 Difference]: With dead ends: 63 [2020-12-09 10:18:46,336 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 10:18:46,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:18:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 10:18:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-12-09 10:18:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 10:18:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 93 transitions. [2020-12-09 10:18:46,343 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 93 transitions. Word has length 8 [2020-12-09 10:18:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:18:46,343 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 93 transitions. [2020-12-09 10:18:46,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:18:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 93 transitions. [2020-12-09 10:18:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 10:18:46,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:18:46,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:18:46,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 10:18:46,344 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:18:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:18:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1195512545, now seen corresponding path program 2 times [2020-12-09 10:18:46,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:18:46,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161638785] [2020-12-09 10:18:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:18:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:18:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:18:46,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161638785] [2020-12-09 10:18:46,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:18:46,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:18:46,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527185263] [2020-12-09 10:18:46,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:18:46,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:18:46,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:18:46,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:18:46,386 INFO L87 Difference]: Start difference. First operand 51 states and 93 transitions. Second operand 4 states. [2020-12-09 10:18:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:18:46,399 INFO L93 Difference]: Finished difference Result 52 states and 85 transitions. [2020-12-09 10:18:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:18:46,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 10:18:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:18:46,400 INFO L225 Difference]: With dead ends: 52 [2020-12-09 10:18:46,400 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 10:18:46,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:18:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 10:18:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 10:18:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 10:18:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 43 transitions. [2020-12-09 10:18:46,403 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 43 transitions. Word has length 8 [2020-12-09 10:18:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:18:46,404 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 43 transitions. [2020-12-09 10:18:46,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:18:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 43 transitions. [2020-12-09 10:18:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 10:18:46,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:18:46,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:18:46,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 10:18:46,405 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:18:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:18:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1199016759, now seen corresponding path program 1 times [2020-12-09 10:18:46,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:18:46,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141923483] [2020-12-09 10:18:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:18:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:18:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:18:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141923483] [2020-12-09 10:18:46,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:18:46,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:18:46,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403934626] [2020-12-09 10:18:46,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:18:46,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:18:46,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:18:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:18:46,457 INFO L87 Difference]: Start difference. First operand 28 states and 43 transitions. Second operand 4 states. [2020-12-09 10:18:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:18:46,470 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2020-12-09 10:18:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:18:46,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 10:18:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:18:46,471 INFO L225 Difference]: With dead ends: 27 [2020-12-09 10:18:46,471 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 10:18:46,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:18:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 10:18:46,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 10:18:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 10:18:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2020-12-09 10:18:46,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 9 [2020-12-09 10:18:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:18:46,474 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2020-12-09 10:18:46,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:18:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2020-12-09 10:18:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 10:18:46,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:18:46,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:18:46,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 10:18:46,475 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:18:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:18:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1520437605, now seen corresponding path program 1 times [2020-12-09 10:18:46,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:18:46,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327462151] [2020-12-09 10:18:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:18:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:18:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:18:46,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327462151] [2020-12-09 10:18:46,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:18:46,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:18:46,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464514979] [2020-12-09 10:18:46,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:18:46,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:18:46,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:18:46,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:18:46,520 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 5 states. [2020-12-09 10:18:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:18:46,531 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2020-12-09 10:18:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:18:46,532 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 10:18:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:18:46,532 INFO L225 Difference]: With dead ends: 18 [2020-12-09 10:18:46,532 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 10:18:46,532 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 [2020-12-09 10:18:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 10:18:46,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 10:18:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 10:18:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 10:18:46,532 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-12-09 10:18:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:18:46,533 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 10:18:46,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:18:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 10:18:46,533 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 10:18:46,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 10:18:46,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:18:46 BasicIcfg [2020-12-09 10:18:46,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:18:46,535 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:18:46,535 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:18:46,535 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:18:46,536 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:18:43" (3/4) ... [2020-12-09 10:18:46,538 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 10:18:46,542 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 10:18:46,542 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 10:18:46,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-09 10:18:46,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 10:18:46,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 10:18:46,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 10:18:46,571 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9ac72784-5b8c-4c15-a129-5d6a682c8906/bin/utaipan/witness.graphml [2020-12-09 10:18:46,571 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:18:46,572 INFO L168 Benchmark]: Toolchain (without parser) took 3338.34 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 51.0 MB in the beginning and 52.3 MB in the end (delta: -1.3 MB). Peak memory consumption was 43.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:18:46,572 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 92.3 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:18:46,573 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.69 ms. Allocated memory is still 92.3 MB. Free memory was 50.7 MB in the beginning and 44.2 MB in the end (delta: 6.6 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-12-09 10:18:46,573 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 92.3 MB. Free memory was 44.2 MB in the beginning and 42.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:18:46,574 INFO L168 Benchmark]: Boogie Preprocessor took 16.67 ms. Allocated memory is still 92.3 MB. Free memory was 42.3 MB in the beginning and 41.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:18:46,574 INFO L168 Benchmark]: RCFGBuilder took 253.00 ms. Allocated memory is still 92.3 MB. Free memory was 41.0 MB in the beginning and 53.7 MB in the end (delta: -12.7 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB. [2020-12-09 10:18:46,575 INFO L168 Benchmark]: TraceAbstraction took 2689.27 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 53.3 MB in the beginning and 54.3 MB in the end (delta: -991.5 kB). Peak memory consumption was 42.3 MB. Max. memory is 16.1 GB. [2020-12-09 10:18:46,575 INFO L168 Benchmark]: Witness Printer took 35.88 ms. Allocated memory is still 134.2 MB. Free memory was 54.3 MB in the beginning and 52.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:18:46,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 92.3 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.69 ms. Allocated memory is still 92.3 MB. Free memory was 50.7 MB in the beginning and 44.2 MB in the end (delta: 6.6 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 92.3 MB. Free memory was 44.2 MB in the beginning and 42.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.67 ms. Allocated memory is still 92.3 MB. Free memory was 42.3 MB in the beginning and 41.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 253.00 ms. Allocated memory is still 92.3 MB. Free memory was 41.0 MB in the beginning and 53.7 MB in the end (delta: -12.7 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2689.27 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 53.3 MB in the beginning and 54.3 MB in the end (delta: -991.5 kB). Peak memory consumption was 42.3 MB. Max. memory is 16.1 GB. * Witness Printer took 35.88 ms. Allocated memory is still 134.2 MB. Free memory was 54.3 MB in the beginning and 52.3 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 473 VarBasedMoverChecksPositive, 26 VarBasedMoverChecksNegative, 4 SemBasedMoverChecksPositive, 22 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 47 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 65 PlacesBefore, 22 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 696 CoEnabledTransitionPairs, 6 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 1 ChoiceCompositions, 55 TotalNumberOfCompositions, 1378 MoverChecksTotal - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 86 SDtfs, 58 SDslu, 81 SDs, 0 SdLazy, 39 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 1248 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...