./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/peterson.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_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/peterson.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/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 997418c6caa3dfe6137e5cc9e02fb9342381aa72 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:25:32,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:25:32,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:25:32,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:25:32,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:25:32,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:25:32,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:25:32,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:25:32,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:25:32,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:25:32,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:25:32,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:25:32,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:25:32,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:25:32,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:25:32,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:25:32,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:25:32,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:25:32,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:25:32,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:25:32,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:25:32,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:25:32,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:25:32,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:25:32,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:25:32,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:25:32,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:25:32,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:25:32,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:25:32,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:25:32,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:25:32,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:25:32,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:25:32,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:25:32,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:25:32,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:25:32,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:25:32,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:25:32,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:25:32,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:25:32,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:25:32,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:25:32,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:25:32,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:25:32,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:25:32,621 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:25:32,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:25:32,622 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:25:32,622 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:25:32,622 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:25:32,623 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:25:32,623 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:25:32,624 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:25:32,625 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:25:32,625 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:25:32,625 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:25:32,626 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:25:32,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:25:32,627 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:25:32,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:25:32,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:25:32,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:25:32,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:25:32,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:25:32,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:25:32,629 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:25:32,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:25:32,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:25:32,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:25:32,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:25:32,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:25:32,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:25:32,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:25:32,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:25:32,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:25:32,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:25:32,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:25:32,633 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:25:32,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:25:32,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:25:32,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:25:32,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:25:32,635 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_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 997418c6caa3dfe6137e5cc9e02fb9342381aa72 [2020-11-28 07:25:32,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:25:32,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:25:32,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:25:32,953 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:25:32,954 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:25:32,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/../../sv-benchmarks/c/pthread-atomic/peterson.i [2020-11-28 07:25:33,033 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/data/087901140/ba20a4d97cad431dbf98b8fee72d8860/FLAG8b64fea6a [2020-11-28 07:25:33,668 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:25:33,668 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/sv-benchmarks/c/pthread-atomic/peterson.i [2020-11-28 07:25:33,682 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/data/087901140/ba20a4d97cad431dbf98b8fee72d8860/FLAG8b64fea6a [2020-11-28 07:25:33,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/data/087901140/ba20a4d97cad431dbf98b8fee72d8860 [2020-11-28 07:25:33,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:25:33,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:25:33,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:25:33,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:25:33,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:25:33,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:25:33" (1/1) ... [2020-11-28 07:25:33,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe81afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:33, skipping insertion in model container [2020-11-28 07:25:33,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:25:33" (1/1) ... [2020-11-28 07:25:33,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:25:34,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:25:34,244 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-11-28 07:25:34,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:25:34,477 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:25:34,494 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-11-28 07:25:34,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:25:34,607 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:25:34,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34 WrapperNode [2020-11-28 07:25:34,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:25:34,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:25:34,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:25:34,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:25:34,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:25:34,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:25:34,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:25:34,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:25:34,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:25:34,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:25:34,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:25:34,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:25:34,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/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 [2020-11-28 07:25:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:25:34,785 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-11-28 07:25:34,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-11-28 07:25:34,785 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-11-28 07:25:34,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-11-28 07:25:34,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:25:34,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-28 07:25:34,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:25:34,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:25:34,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:25:34,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-28 07:25:34,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:25:34,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:25:34,790 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-28 07:25:35,267 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:25:35,268 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-28 07:25:35,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:25:35 BoogieIcfgContainer [2020-11-28 07:25:35,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:25:35,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:25:35,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:25:35,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:25:35,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:25:33" (1/3) ... [2020-11-28 07:25:35,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1134ba5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:25:35, skipping insertion in model container [2020-11-28 07:25:35,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (2/3) ... [2020-11-28 07:25:35,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1134ba5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:25:35, skipping insertion in model container [2020-11-28 07:25:35,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:25:35" (3/3) ... [2020-11-28 07:25:35,280 INFO L111 eAbstractionObserver]: Analyzing ICFG peterson.i [2020-11-28 07:25:35,292 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-28 07:25:35,292 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:25:35,297 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 07:25:35,299 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-28 07:25:35,325 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,326 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,326 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,326 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,326 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,327 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,327 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,327 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,327 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,327 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,328 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,328 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,328 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,328 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,329 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,329 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,329 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,330 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,330 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,332 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,332 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,332 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,332 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,332 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,333 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,333 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,333 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,333 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,334 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,334 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,334 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,334 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,337 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,337 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,337 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,337 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,338 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,338 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,338 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,338 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,346 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,347 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,347 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,347 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,347 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,347 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,348 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,348 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:25:35,365 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-11-28 07:25:35,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-28 07:25:35,403 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:25:35,403 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:25:35,403 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:25:35,403 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:25:35,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:25:35,404 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:25:35,404 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:25:35,404 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:25:35,420 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-28 07:25:35,423 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 82 transitions, 186 flow [2020-11-28 07:25:35,426 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 82 transitions, 186 flow [2020-11-28 07:25:35,428 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 186 flow [2020-11-28 07:25:35,472 INFO L129 PetriNetUnfolder]: 9/82 cut-off events. [2020-11-28 07:25:35,473 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-11-28 07:25:35,478 INFO L80 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 82 events. 9/82 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 55. Up to 3 conditions per place. [2020-11-28 07:25:35,482 INFO L116 LiptonReduction]: Number of co-enabled transitions 1540 [2020-11-28 07:25:37,065 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-28 07:25:37,735 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-11-28 07:25:37,971 INFO L131 LiptonReduction]: Checked pairs total: 4826 [2020-11-28 07:25:37,971 INFO L133 LiptonReduction]: Total number of compositions: 65 [2020-11-28 07:25:37,976 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 37 transitions, 96 flow [2020-11-28 07:25:38,006 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 285 states. [2020-11-28 07:25:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states. [2020-11-28 07:25:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:25:38,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:38,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:38,017 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash -161333597, now seen corresponding path program 1 times [2020-11-28 07:25:38,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:38,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734860383] [2020-11-28 07:25:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:25:38,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734860383] [2020-11-28 07:25:38,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:38,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:25:38,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118927892] [2020-11-28 07:25:38,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:38,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:38,302 INFO L87 Difference]: Start difference. First operand 285 states. Second operand 3 states. [2020-11-28 07:25:38,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:38,386 INFO L93 Difference]: Finished difference Result 319 states and 694 transitions. [2020-11-28 07:25:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:38,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-28 07:25:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:38,429 INFO L225 Difference]: With dead ends: 319 [2020-11-28 07:25:38,430 INFO L226 Difference]: Without dead ends: 224 [2020-11-28 07:25:38,432 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 [2020-11-28 07:25:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-11-28 07:25:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 210. [2020-11-28 07:25:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-28 07:25:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 481 transitions. [2020-11-28 07:25:38,540 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 481 transitions. Word has length 8 [2020-11-28 07:25:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:38,546 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 481 transitions. [2020-11-28 07:25:38,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 481 transitions. [2020-11-28 07:25:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:25:38,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:38,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:38,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:25:38,548 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:38,549 INFO L82 PathProgramCache]: Analyzing trace with hash 160471046, now seen corresponding path program 1 times [2020-11-28 07:25:38,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:38,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294700578] [2020-11-28 07:25:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:25:38,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294700578] [2020-11-28 07:25:38,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:38,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:25:38,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393934116] [2020-11-28 07:25:38,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:38,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:38,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:38,637 INFO L87 Difference]: Start difference. First operand 210 states and 481 transitions. Second operand 3 states. [2020-11-28 07:25:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:38,671 INFO L93 Difference]: Finished difference Result 201 states and 446 transitions. [2020-11-28 07:25:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:38,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-28 07:25:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:38,678 INFO L225 Difference]: With dead ends: 201 [2020-11-28 07:25:38,678 INFO L226 Difference]: Without dead ends: 148 [2020-11-28 07:25:38,679 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 [2020-11-28 07:25:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-28 07:25:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-11-28 07:25:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-28 07:25:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 328 transitions. [2020-11-28 07:25:38,695 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 328 transitions. Word has length 10 [2020-11-28 07:25:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:38,695 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 328 transitions. [2020-11-28 07:25:38,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 328 transitions. [2020-11-28 07:25:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:25:38,703 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:38,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:38,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:25:38,704 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:38,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1180724653, now seen corresponding path program 1 times [2020-11-28 07:25:38,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:38,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860542956] [2020-11-28 07:25:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:25:38,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860542956] [2020-11-28 07:25:38,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:38,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 07:25:38,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653858469] [2020-11-28 07:25:38,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:25:38,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:38,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:25:38,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:25:38,874 INFO L87 Difference]: Start difference. First operand 148 states and 328 transitions. Second operand 6 states. [2020-11-28 07:25:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:39,076 INFO L93 Difference]: Finished difference Result 218 states and 503 transitions. [2020-11-28 07:25:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:25:39,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-28 07:25:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:39,080 INFO L225 Difference]: With dead ends: 218 [2020-11-28 07:25:39,080 INFO L226 Difference]: Without dead ends: 158 [2020-11-28 07:25:39,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:25:39,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-28 07:25:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 146. [2020-11-28 07:25:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-28 07:25:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 319 transitions. [2020-11-28 07:25:39,094 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 319 transitions. Word has length 15 [2020-11-28 07:25:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:39,094 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 319 transitions. [2020-11-28 07:25:39,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:25:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 319 transitions. [2020-11-28 07:25:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:25:39,096 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:39,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:39,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:25:39,097 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1125613139, now seen corresponding path program 2 times [2020-11-28 07:25:39,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:39,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347659636] [2020-11-28 07:25:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:25:39,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347659636] [2020-11-28 07:25:39,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:39,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 07:25:39,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709859881] [2020-11-28 07:25:39,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:25:39,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:39,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:25:39,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:25:39,186 INFO L87 Difference]: Start difference. First operand 146 states and 319 transitions. Second operand 6 states. [2020-11-28 07:25:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:39,270 INFO L93 Difference]: Finished difference Result 100 states and 236 transitions. [2020-11-28 07:25:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:25:39,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-28 07:25:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:39,271 INFO L225 Difference]: With dead ends: 100 [2020-11-28 07:25:39,271 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:25:39,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:25:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:25:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:25:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:25:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:25:39,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-11-28 07:25:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:39,272 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:25:39,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:25:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:25:39,273 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:25:39,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:25:39,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:25:39 BasicIcfg [2020-11-28 07:25:39,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:25:39,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:25:39,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:25:39,277 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:25:39,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:25:35" (3/4) ... [2020-11-28 07:25:39,280 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:25:39,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr2 [2020-11-28 07:25:39,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2020-11-28 07:25:39,295 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-28 07:25:39,295 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:25:39,296 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:25:39,296 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:25:39,367 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d52732be-5b7a-48d4-b6d3-bbfe71c2809c/bin/utaipan/witness.graphml [2020-11-28 07:25:39,367 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:25:39,369 INFO L168 Benchmark]: Toolchain (without parser) took 5439.39 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 76.0 MB in the beginning and 47.3 MB in the end (delta: 28.6 MB). Peak memory consumption was 50.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:39,370 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 79.7 MB. Free memory is still 41.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:39,375 INFO L168 Benchmark]: CACSL2BoogieTranslator took 676.86 ms. Allocated memory is still 107.0 MB. Free memory was 75.7 MB in the beginning and 64.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:39,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.05 ms. Allocated memory is still 107.0 MB. Free memory was 64.6 MB in the beginning and 62.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:39,378 INFO L168 Benchmark]: Boogie Preprocessor took 30.27 ms. Allocated memory is still 107.0 MB. Free memory was 62.5 MB in the beginning and 61.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:39,378 INFO L168 Benchmark]: RCFGBuilder took 583.59 ms. Allocated memory is still 107.0 MB. Free memory was 61.2 MB in the beginning and 71.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:39,379 INFO L168 Benchmark]: TraceAbstraction took 4004.34 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 70.6 MB in the beginning and 49.4 MB in the end (delta: 21.1 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:39,380 INFO L168 Benchmark]: Witness Printer took 90.41 ms. Allocated memory is still 130.0 MB. Free memory was 49.4 MB in the beginning and 47.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:39,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 79.7 MB. Free memory is still 41.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 676.86 ms. Allocated memory is still 107.0 MB. Free memory was 75.7 MB in the beginning and 64.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.05 ms. Allocated memory is still 107.0 MB. Free memory was 64.6 MB in the beginning and 62.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.27 ms. Allocated memory is still 107.0 MB. Free memory was 62.5 MB in the beginning and 61.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 583.59 ms. Allocated memory is still 107.0 MB. Free memory was 61.2 MB in the beginning and 71.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4004.34 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 70.6 MB in the beginning and 49.4 MB in the end (delta: 21.1 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. * Witness Printer took 90.41 ms. Allocated memory is still 130.0 MB. Free memory was 49.4 MB in the beginning and 47.3 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 1091 VarBasedMoverChecksPositive, 56 VarBasedMoverChecksNegative, 13 SemBasedMoverChecksPositive, 43 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 195 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.5s, 79 PlacesBefore, 38 PlacesAfterwards, 82 TransitionsBefore, 37 TransitionsAfterwards, 1540 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 4 ChoiceCompositions, 65 TotalNumberOfCompositions, 4826 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, 73 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 156 SDtfs, 123 SDslu, 181 SDs, 0 SdLazy, 112 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=285occurred 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, 4 MinimizatonAttempts, 26 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 1282 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...