./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/szymanski.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_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/szymanski.i -s /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/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 d7ed3fc81a6baa40baeec77c0043080ce5c04efa .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 12:59:52,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:59:52,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:59:52,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:59:52,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:59:52,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:59:52,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:59:52,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:59:52,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:59:52,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:59:52,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:59:52,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:59:52,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:59:52,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:59:52,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:59:52,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:59:52,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:59:52,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:59:52,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:59:52,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:59:52,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:59:52,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:59:52,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:59:52,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:59:52,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:59:52,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:59:52,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:59:52,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:59:52,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:59:52,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:59:52,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:59:52,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:59:52,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:59:52,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:59:52,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:59:52,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:59:52,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:59:52,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:59:52,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:59:52,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:59:52,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:59:52,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:59:52,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:59:52,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:59:52,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:59:52,570 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:59:52,570 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:59:52,570 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:59:52,570 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:59:52,571 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:59:52,571 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:59:52,571 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:59:52,572 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:59:52,573 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:59:52,573 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:59:52,573 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:59:52,573 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:59:52,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:59:52,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:59:52,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:59:52,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:59:52,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:59:52,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:59:52,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:59:52,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:59:52,576 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:59:52,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:59:52,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:59:52,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:59:52,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:59:52,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:59:52,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:59:52,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:59:52,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:59:52,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:59:52,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:59:52,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:59:52,581 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:59:52,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:59:52,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:59:52,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:59:52,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:59:52,582 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_30cd2456-0561-4ccc-8bcf-a9f2529c195b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7ed3fc81a6baa40baeec77c0043080ce5c04efa [2020-11-22 12:59:52,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:59:52,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:59:52,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:59:52,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:59:52,908 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:59:52,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/../../sv-benchmarks/c/pthread-atomic/szymanski.i [2020-11-22 12:59:52,997 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/data/d23ca104f/ad05cd9203fc4445b049fd328593e905/FLAG6cba4982e [2020-11-22 12:59:53,551 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:59:53,552 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/sv-benchmarks/c/pthread-atomic/szymanski.i [2020-11-22 12:59:53,571 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/data/d23ca104f/ad05cd9203fc4445b049fd328593e905/FLAG6cba4982e [2020-11-22 12:59:53,849 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/data/d23ca104f/ad05cd9203fc4445b049fd328593e905 [2020-11-22 12:59:53,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:59:53,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:59:53,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:59:53,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:59:53,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:59:53,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:59:53" (1/1) ... [2020-11-22 12:59:53,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160ed477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:53, skipping insertion in model container [2020-11-22 12:59:53,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:59:53" (1/1) ... [2020-11-22 12:59:53,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:59:53,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:59:54,128 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-11-22 12:59:54,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:59:54,291 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:59:54,307 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-11-22 12:59:54,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:59:54,448 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:59:54,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54 WrapperNode [2020-11-22 12:59:54,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:59:54,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:59:54,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:59:54,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:59:54,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... [2020-11-22 12:59:54,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... [2020-11-22 12:59:54,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:59:54,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:59:54,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:59:54,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:59:54,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... [2020-11-22 12:59:54,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... [2020-11-22 12:59:54,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... [2020-11-22 12:59:54,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... [2020-11-22 12:59:54,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... [2020-11-22 12:59:54,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... [2020-11-22 12:59:54,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... [2020-11-22 12:59:54,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:59:54,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:59:54,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:59:54,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:59:54,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/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 12:59:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 12:59:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-11-22 12:59:54,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-11-22 12:59:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-11-22 12:59:54,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-11-22 12:59:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:59:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-22 12:59:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:59:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:59:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:59:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-22 12:59:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:59:54,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:59:54,659 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 12:59:55,159 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:59:55,159 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-11-22 12:59:55,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:55 BoogieIcfgContainer [2020-11-22 12:59:55,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:59:55,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:59:55,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:59:55,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:59:55,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:59:53" (1/3) ... [2020-11-22 12:59:55,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43779ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:59:55, skipping insertion in model container [2020-11-22 12:59:55,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:54" (2/3) ... [2020-11-22 12:59:55,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43779ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:59:55, skipping insertion in model container [2020-11-22 12:59:55,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:55" (3/3) ... [2020-11-22 12:59:55,172 INFO L111 eAbstractionObserver]: Analyzing ICFG szymanski.i [2020-11-22 12:59:55,183 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 12:59:55,183 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:59:55,188 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 12:59:55,189 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 12:59:55,215 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,216 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,216 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,216 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,217 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,217 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,217 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,217 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,218 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,218 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,218 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,218 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,219 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,219 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,219 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,219 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,220 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,220 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,220 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,220 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,221 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,221 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,221 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,221 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,222 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,222 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,222 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,222 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,223 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,224 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,224 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,224 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,224 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,224 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,225 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,225 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,225 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,225 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,226 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,226 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,226 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,226 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,227 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,227 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,227 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,227 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,228 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,228 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,228 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,228 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,228 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,229 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,229 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,229 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,230 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,230 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,230 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,230 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,235 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,235 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,236 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,236 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,236 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,236 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,236 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,241 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,241 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,242 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,242 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,242 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,242 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,242 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:59:55,255 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-11-22 12:59:55,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-22 12:59:55,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:59:55,292 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:59:55,292 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:59:55,293 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:59:55,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:59:55,293 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:59:55,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:59:55,293 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:59:55,307 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 12:59:55,309 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 117 transitions, 256 flow [2020-11-22 12:59:55,312 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 117 transitions, 256 flow [2020-11-22 12:59:55,314 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 117 transitions, 256 flow [2020-11-22 12:59:55,362 INFO L129 PetriNetUnfolder]: 23/117 cut-off events. [2020-11-22 12:59:55,362 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-11-22 12:59:55,369 INFO L80 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 117 events. 23/117 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 200 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 91. Up to 3 conditions per place. [2020-11-22 12:59:55,376 INFO L116 LiptonReduction]: Number of co-enabled transitions 4240 [2020-11-22 12:59:56,942 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-22 12:59:57,298 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-11-22 12:59:57,413 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-22 12:59:57,441 INFO L131 LiptonReduction]: Checked pairs total: 10725 [2020-11-22 12:59:57,442 INFO L133 LiptonReduction]: Total number of compositions: 91 [2020-11-22 12:59:57,447 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 54 transitions, 130 flow [2020-11-22 12:59:57,478 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 540 states. [2020-11-22 12:59:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states. [2020-11-22 12:59:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 12:59:57,487 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:57,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:57,488 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1850362529, now seen corresponding path program 1 times [2020-11-22 12:59:57,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:57,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810227787] [2020-11-22 12:59:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:59:57,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810227787] [2020-11-22 12:59:57,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:59:57,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:59:57,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180278284] [2020-11-22 12:59:57,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:59:57,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:59:57,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:57,717 INFO L87 Difference]: Start difference. First operand 540 states. Second operand 3 states. [2020-11-22 12:59:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:57,790 INFO L93 Difference]: Finished difference Result 588 states and 1620 transitions. [2020-11-22 12:59:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:59:57,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-22 12:59:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:57,811 INFO L225 Difference]: With dead ends: 588 [2020-11-22 12:59:57,811 INFO L226 Difference]: Without dead ends: 420 [2020-11-22 12:59:57,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-11-22 12:59:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 402. [2020-11-22 12:59:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-11-22 12:59:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1144 transitions. [2020-11-22 12:59:57,900 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1144 transitions. Word has length 10 [2020-11-22 12:59:57,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:57,901 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 1144 transitions. [2020-11-22 12:59:57,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:59:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1144 transitions. [2020-11-22 12:59:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:59:57,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:57,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:57,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:59:57,905 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1505442362, now seen corresponding path program 1 times [2020-11-22 12:59:57,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:57,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787486020] [2020-11-22 12:59:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:57,993 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 12:59:57,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787486020] [2020-11-22 12:59:57,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:59:57,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:59:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037129828] [2020-11-22 12:59:57,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:59:57,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:57,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:59:57,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:57,997 INFO L87 Difference]: Start difference. First operand 402 states and 1144 transitions. Second operand 3 states. [2020-11-22 12:59:58,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:58,030 INFO L93 Difference]: Finished difference Result 389 states and 1093 transitions. [2020-11-22 12:59:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:59:58,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-22 12:59:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:58,037 INFO L225 Difference]: With dead ends: 389 [2020-11-22 12:59:58,037 INFO L226 Difference]: Without dead ends: 284 [2020-11-22 12:59:58,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:58,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-11-22 12:59:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2020-11-22 12:59:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-11-22 12:59:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 801 transitions. [2020-11-22 12:59:58,077 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 801 transitions. Word has length 12 [2020-11-22 12:59:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:58,078 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 801 transitions. [2020-11-22 12:59:58,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:59:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 801 transitions. [2020-11-22 12:59:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 12:59:58,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:58,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:58,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:59:58,086 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:58,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1965362268, now seen corresponding path program 1 times [2020-11-22 12:59:58,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:58,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540395567] [2020-11-22 12:59:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:58,166 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 12:59:58,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540395567] [2020-11-22 12:59:58,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:59:58,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:59:58,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846184434] [2020-11-22 12:59:58,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:59:58,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:58,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:59:58,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:59:58,169 INFO L87 Difference]: Start difference. First operand 284 states and 801 transitions. Second operand 4 states. [2020-11-22 12:59:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:58,288 INFO L93 Difference]: Finished difference Result 332 states and 922 transitions. [2020-11-22 12:59:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:59:58,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-22 12:59:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:58,291 INFO L225 Difference]: With dead ends: 332 [2020-11-22 12:59:58,292 INFO L226 Difference]: Without dead ends: 254 [2020-11-22 12:59:58,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 12:59:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-11-22 12:59:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 236. [2020-11-22 12:59:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-11-22 12:59:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 621 transitions. [2020-11-22 12:59:58,304 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 621 transitions. Word has length 19 [2020-11-22 12:59:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:58,305 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 621 transitions. [2020-11-22 12:59:58,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:59:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 621 transitions. [2020-11-22 12:59:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 12:59:58,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:58,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:58,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:59:58,307 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:58,308 INFO L82 PathProgramCache]: Analyzing trace with hash -569850504, now seen corresponding path program 2 times [2020-11-22 12:59:58,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:58,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936822884] [2020-11-22 12:59:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:58,391 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 12:59:58,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936822884] [2020-11-22 12:59:58,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:59:58,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:59:58,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530900661] [2020-11-22 12:59:58,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:59:58,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:59:58,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:59:58,393 INFO L87 Difference]: Start difference. First operand 236 states and 621 transitions. Second operand 4 states. [2020-11-22 12:59:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:58,511 INFO L93 Difference]: Finished difference Result 300 states and 790 transitions. [2020-11-22 12:59:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:59:58,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-22 12:59:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:58,513 INFO L225 Difference]: With dead ends: 300 [2020-11-22 12:59:58,513 INFO L226 Difference]: Without dead ends: 268 [2020-11-22 12:59:58,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 12:59:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-11-22 12:59:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2020-11-22 12:59:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-11-22 12:59:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 633 transitions. [2020-11-22 12:59:58,525 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 633 transitions. Word has length 19 [2020-11-22 12:59:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:58,525 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 633 transitions. [2020-11-22 12:59:58,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:59:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 633 transitions. [2020-11-22 12:59:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 12:59:58,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:58,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:58,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:59:58,527 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:58,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1907556842, now seen corresponding path program 1 times [2020-11-22 12:59:58,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:58,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892227059] [2020-11-22 12:59:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:58,616 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 12:59:58,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892227059] [2020-11-22 12:59:58,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:59:58,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:59:58,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649118317] [2020-11-22 12:59:58,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:59:58,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:58,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:59:58,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:59:58,619 INFO L87 Difference]: Start difference. First operand 244 states and 633 transitions. Second operand 4 states. [2020-11-22 12:59:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:58,725 INFO L93 Difference]: Finished difference Result 360 states and 905 transitions. [2020-11-22 12:59:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:59:58,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-22 12:59:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:58,729 INFO L225 Difference]: With dead ends: 360 [2020-11-22 12:59:58,729 INFO L226 Difference]: Without dead ends: 360 [2020-11-22 12:59:58,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 12:59:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-11-22 12:59:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 292. [2020-11-22 12:59:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-11-22 12:59:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 765 transitions. [2020-11-22 12:59:58,741 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 765 transitions. Word has length 19 [2020-11-22 12:59:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:58,742 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 765 transitions. [2020-11-22 12:59:58,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:59:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 765 transitions. [2020-11-22 12:59:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 12:59:58,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:58,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:58,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:59:58,743 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1687523182, now seen corresponding path program 2 times [2020-11-22 12:59:58,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:58,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318829951] [2020-11-22 12:59:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:58,795 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 12:59:58,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318829951] [2020-11-22 12:59:58,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:59:58,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:59:58,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685786355] [2020-11-22 12:59:58,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:59:58,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:58,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:59:58,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:59:58,797 INFO L87 Difference]: Start difference. First operand 292 states and 765 transitions. Second operand 4 states. [2020-11-22 12:59:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:58,871 INFO L93 Difference]: Finished difference Result 246 states and 662 transitions. [2020-11-22 12:59:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:59:58,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-22 12:59:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:58,872 INFO L225 Difference]: With dead ends: 246 [2020-11-22 12:59:58,872 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:59:58,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 12:59:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:59:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:59:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:59:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:59:58,874 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-22 12:59:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:58,874 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:59:58,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:59:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:59:58,874 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:59:58,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 12:59:58,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:59:58 BasicIcfg [2020-11-22 12:59:58,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:59:58,878 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:59:58,878 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:59:58,878 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:59:58,879 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:55" (3/4) ... [2020-11-22 12:59:58,882 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:59:58,888 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr2 [2020-11-22 12:59:58,888 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2020-11-22 12:59:58,892 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-22 12:59:58,892 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:59:58,892 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:59:58,893 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:59:58,943 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_30cd2456-0561-4ccc-8bcf-a9f2529c195b/bin/utaipan/witness.graphml [2020-11-22 12:59:58,944 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:59:58,945 INFO L168 Benchmark]: Toolchain (without parser) took 5092.12 ms. Allocated memory was 113.2 MB in the beginning and 169.9 MB in the end (delta: 56.6 MB). Free memory was 85.8 MB in the beginning and 130.4 MB in the end (delta: -44.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:58,945 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 113.2 MB. Free memory is still 73.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:59:58,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 596.31 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 68.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:58,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.85 ms. Allocated memory is still 113.2 MB. Free memory was 68.1 MB in the beginning and 65.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:58,947 INFO L168 Benchmark]: Boogie Preprocessor took 45.86 ms. Allocated memory is still 113.2 MB. Free memory was 65.9 MB in the beginning and 64.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:58,947 INFO L168 Benchmark]: RCFGBuilder took 578.14 ms. Allocated memory was 113.2 MB in the beginning and 140.5 MB in the end (delta: 27.3 MB). Free memory was 64.3 MB in the beginning and 102.1 MB in the end (delta: -37.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:58,948 INFO L168 Benchmark]: TraceAbstraction took 3713.88 ms. Allocated memory was 140.5 MB in the beginning and 169.9 MB in the end (delta: 29.4 MB). Free memory was 101.5 MB in the beginning and 133.6 MB in the end (delta: -32.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:59:58,948 INFO L168 Benchmark]: Witness Printer took 65.88 ms. Allocated memory is still 169.9 MB. Free memory was 133.6 MB in the beginning and 130.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:58,951 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 113.2 MB. Free memory is still 73.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 596.31 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 68.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.85 ms. Allocated memory is still 113.2 MB. Free memory was 68.1 MB in the beginning and 65.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.86 ms. Allocated memory is still 113.2 MB. Free memory was 65.9 MB in the beginning and 64.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 578.14 ms. Allocated memory was 113.2 MB in the beginning and 140.5 MB in the end (delta: 27.3 MB). Free memory was 64.3 MB in the beginning and 102.1 MB in the end (delta: -37.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3713.88 ms. Allocated memory was 140.5 MB in the beginning and 169.9 MB in the end (delta: 29.4 MB). Free memory was 101.5 MB in the beginning and 133.6 MB in the end (delta: -32.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 65.88 ms. Allocated memory is still 169.9 MB. Free memory was 133.6 MB in the beginning and 130.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 2720 VarBasedMoverChecksPositive, 66 VarBasedMoverChecksNegative, 15 SemBasedMoverChecksPositive, 51 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 293 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.1s, 100 PlacesBefore, 47 PlacesAfterwards, 117 TransitionsBefore, 54 TransitionsAfterwards, 4240 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 10 ChoiceCompositions, 91 TotalNumberOfCompositions, 10725 MoverChecksTotal - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 94 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 352 SDtfs, 241 SDslu, 275 SDs, 0 SdLazy, 189 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=540occurred 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, 6 MinimizatonAttempts, 128 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 2222 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...