./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-1.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_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/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 22a6d794ae7d6ac1007b3e6bed733f083c296e3e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:20:12,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:20:12,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:20:12,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:20:12,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:20:12,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:20:12,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:20:12,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:20:12,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:20:12,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:20:12,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:20:12,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:20:12,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:20:12,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:20:12,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:20:12,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:20:12,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:20:12,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:20:12,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:20:12,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:20:12,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:20:12,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:20:12,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:20:12,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:20:12,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:20:12,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:20:12,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:20:12,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:20:12,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:20:12,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:20:12,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:20:12,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:20:12,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:20:12,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:20:12,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:20:12,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:20:12,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:20:12,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:20:12,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:20:12,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:20:12,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:20:12,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:20:12,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:20:12,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:20:12,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:20:12,621 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:20:12,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:20:12,621 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:20:12,621 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:20:12,621 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:20:12,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:20:12,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:20:12,623 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:20:12,624 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:20:12,624 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:20:12,624 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:20:12,624 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:20:12,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:20:12,625 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:20:12,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:20:12,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:20:12,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:20:12,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:20:12,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:20:12,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:20:12,627 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:20:12,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:20:12,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:20:12,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:20:12,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:20:12,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:20:12,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:20:12,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:20:12,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:20:12,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:20:12,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:20:12,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:20:12,632 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:20:12,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:20:12,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:20:12,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:20:12,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:20:12,633 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_b98dd7bd-b22c-4588-8304-944d03abc91b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22a6d794ae7d6ac1007b3e6bed733f083c296e3e [2020-11-30 02:20:12,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:20:12,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:20:12,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:20:12,996 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:20:12,999 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:20:13,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2020-11-30 02:20:13,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/data/fe2c73f9e/3e3c141703ac44c7b9d52792ae662a72/FLAGe52db30dd [2020-11-30 02:20:13,759 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:20:13,760 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/sv-benchmarks/c/pthread/triangular-longer-1.i [2020-11-30 02:20:13,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/data/fe2c73f9e/3e3c141703ac44c7b9d52792ae662a72/FLAGe52db30dd [2020-11-30 02:20:13,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/data/fe2c73f9e/3e3c141703ac44c7b9d52792ae662a72 [2020-11-30 02:20:13,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:20:13,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:20:13,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:20:13,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:20:13,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:20:13,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:20:13" (1/1) ... [2020-11-30 02:20:13,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6cad26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:13, skipping insertion in model container [2020-11-30 02:20:13,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:20:13" (1/1) ... [2020-11-30 02:20:13,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:20:14,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:20:14,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:20:14,641 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:20:14,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:20:14,823 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:20:14,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14 WrapperNode [2020-11-30 02:20:14,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:20:14,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:20:14,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:20:14,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:20:14,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... [2020-11-30 02:20:14,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... [2020-11-30 02:20:14,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:20:14,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:20:14,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:20:14,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:20:14,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... [2020-11-30 02:20:14,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... [2020-11-30 02:20:14,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... [2020-11-30 02:20:14,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... [2020-11-30 02:20:14,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... [2020-11-30 02:20:14,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... [2020-11-30 02:20:14,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... [2020-11-30 02:20:14,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:20:14,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:20:14,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:20:14,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:20:14,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/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 [2020-11-30 02:20:15,004 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-30 02:20:15,004 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-30 02:20:15,004 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-30 02:20:15,005 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-30 02:20:15,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:20:15,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-30 02:20:15,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:20:15,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:20:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:20:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-30 02:20:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:20:15,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:20:15,008 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-30 02:20:15,498 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:20:15,498 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 02:20:15,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:20:15 BoogieIcfgContainer [2020-11-30 02:20:15,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:20:15,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:20:15,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:20:15,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:20:15,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:20:13" (1/3) ... [2020-11-30 02:20:15,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48869c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:20:15, skipping insertion in model container [2020-11-30 02:20:15,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:20:14" (2/3) ... [2020-11-30 02:20:15,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48869c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:20:15, skipping insertion in model container [2020-11-30 02:20:15,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:20:15" (3/3) ... [2020-11-30 02:20:15,515 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-11-30 02:20:15,527 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-30 02:20:15,527 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:20:15,531 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 02:20:15,532 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-30 02:20:15,559 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,560 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,560 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,560 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,561 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,561 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,561 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,562 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,562 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,562 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,563 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,563 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,563 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,563 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,564 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,564 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,564 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,565 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,565 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,565 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,566 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,566 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,566 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,567 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,567 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,567 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,567 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,568 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,570 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,571 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,571 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,571 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,572 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,572 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,581 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,581 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,582 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,582 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,582 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,583 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 02:20:15,594 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-30 02:20:15,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-30 02:20:15,635 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:20:15,635 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:20:15,636 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:20:15,636 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:20:15,636 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:20:15,636 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:20:15,636 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:20:15,637 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:20:15,650 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-30 02:20:15,652 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-30 02:20:15,656 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-30 02:20:15,658 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-30 02:20:15,701 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-30 02:20:15,701 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-30 02:20:15,706 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-30 02:20:15,709 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-30 02:20:17,523 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-30 02:20:17,984 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-11-30 02:20:18,170 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-30 02:20:18,182 INFO L131 LiptonReduction]: Checked pairs total: 1062 [2020-11-30 02:20:18,182 INFO L133 LiptonReduction]: Total number of compositions: 60 [2020-11-30 02:20:18,188 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-30 02:20:18,197 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-30 02:20:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-30 02:20:18,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 02:20:18,204 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:18,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 02:20:18,205 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:18,211 INFO L82 PathProgramCache]: Analyzing trace with hash -720017533, now seen corresponding path program 1 times [2020-11-30 02:20:18,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:18,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307877443] [2020-11-30 02:20:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:18,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307877443] [2020-11-30 02:20:18,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:20:18,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:20:18,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622061938] [2020-11-30 02:20:18,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:20:18,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:18,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:20:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:20:18,465 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-30 02:20:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:18,538 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-30 02:20:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:20:18,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-30 02:20:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:18,551 INFO L225 Difference]: With dead ends: 75 [2020-11-30 02:20:18,552 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 02:20:18,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:20:18,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 02:20:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-30 02:20:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-30 02:20:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-30 02:20:18,593 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-30 02:20:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:18,594 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-30 02:20:18,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:20:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-30 02:20:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:20:18,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:18,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:18,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:20:18,596 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash -447013893, now seen corresponding path program 1 times [2020-11-30 02:20:18,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:18,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426941035] [2020-11-30 02:20:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:18,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426941035] [2020-11-30 02:20:18,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:20:18,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:20:18,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850352035] [2020-11-30 02:20:18,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:20:18,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:18,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:20:18,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:20:18,711 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-30 02:20:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:18,760 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-30 02:20:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:20:18,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-30 02:20:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:18,762 INFO L225 Difference]: With dead ends: 56 [2020-11-30 02:20:18,762 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 02:20:18,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:20:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 02:20:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-30 02:20:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-30 02:20:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-30 02:20:18,771 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-30 02:20:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:18,772 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-30 02:20:18,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:20:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-30 02:20:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:20:18,774 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:18,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:18,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:20:18,774 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash -190894617, now seen corresponding path program 1 times [2020-11-30 02:20:18,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:18,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251750732] [2020-11-30 02:20:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:18,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251750732] [2020-11-30 02:20:18,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:20:18,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:20:18,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922795763] [2020-11-30 02:20:18,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:20:18,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:18,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:20:18,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:20:18,926 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-30 02:20:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:19,049 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-30 02:20:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 02:20:19,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 02:20:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:19,053 INFO L225 Difference]: With dead ends: 54 [2020-11-30 02:20:19,053 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 02:20:19,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:20:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 02:20:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-30 02:20:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 02:20:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-30 02:20:19,069 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-30 02:20:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:19,070 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-30 02:20:19,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:20:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-30 02:20:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:20:19,073 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:19,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:19,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:20:19,074 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash -83647017, now seen corresponding path program 2 times [2020-11-30 02:20:19,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:19,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119637978] [2020-11-30 02:20:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:19,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119637978] [2020-11-30 02:20:19,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:20:19,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:20:19,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203903869] [2020-11-30 02:20:19,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:20:19,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:19,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:20:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:20:19,209 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-30 02:20:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:19,321 INFO L93 Difference]: Finished difference Result 84 states and 192 transitions. [2020-11-30 02:20:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:20:19,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 02:20:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:19,328 INFO L225 Difference]: With dead ends: 84 [2020-11-30 02:20:19,328 INFO L226 Difference]: Without dead ends: 77 [2020-11-30 02:20:19,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:20:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-30 02:20:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-11-30 02:20:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-30 02:20:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-30 02:20:19,351 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 10 [2020-11-30 02:20:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:19,354 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-30 02:20:19,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:20:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-30 02:20:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:20:19,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:19,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:19,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:20:19,358 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:19,360 INFO L82 PathProgramCache]: Analyzing trace with hash -83970657, now seen corresponding path program 3 times [2020-11-30 02:20:19,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:19,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223711267] [2020-11-30 02:20:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:19,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223711267] [2020-11-30 02:20:19,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:20:19,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:20:19,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481728127] [2020-11-30 02:20:19,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:20:19,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:19,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:20:19,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:20:19,474 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 6 states. [2020-11-30 02:20:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:19,585 INFO L93 Difference]: Finished difference Result 61 states and 139 transitions. [2020-11-30 02:20:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 02:20:19,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 02:20:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:19,587 INFO L225 Difference]: With dead ends: 61 [2020-11-30 02:20:19,588 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 02:20:19,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:20:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 02:20:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-30 02:20:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-30 02:20:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 96 transitions. [2020-11-30 02:20:19,596 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 96 transitions. Word has length 10 [2020-11-30 02:20:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:19,597 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 96 transitions. [2020-11-30 02:20:19,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:20:19,597 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 96 transitions. [2020-11-30 02:20:19,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:20:19,598 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:19,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:19,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:20:19,598 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:19,599 INFO L82 PathProgramCache]: Analyzing trace with hash -118912617, now seen corresponding path program 4 times [2020-11-30 02:20:19,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:19,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335257065] [2020-11-30 02:20:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:19,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335257065] [2020-11-30 02:20:19,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:20:19,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:20:19,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968602856] [2020-11-30 02:20:19,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:20:19,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:19,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:20:19,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:20:19,713 INFO L87 Difference]: Start difference. First operand 40 states and 96 transitions. Second operand 6 states. [2020-11-30 02:20:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:19,815 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-11-30 02:20:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 02:20:19,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 02:20:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:19,821 INFO L225 Difference]: With dead ends: 55 [2020-11-30 02:20:19,821 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 02:20:19,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:20:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 02:20:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-30 02:20:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-30 02:20:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-30 02:20:19,829 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-30 02:20:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:19,829 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-30 02:20:19,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:20:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-30 02:20:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:20:19,831 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:19,831 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:19,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 02:20:19,831 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:19,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1691902418, now seen corresponding path program 5 times [2020-11-30 02:20:19,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:19,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949786529] [2020-11-30 02:20:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:19,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949786529] [2020-11-30 02:20:19,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211621537] [2020-11-30 02:20:19,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:20,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:20:20,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:20:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:20:20,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:20:20,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:20:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:20,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:20:20,242 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:20,242 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:20,304 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:20,304 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:20,356 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:20,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791292882] [2020-11-30 02:20:20,447 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:20:20,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:20:20,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2020-11-30 02:20:20,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972918184] [2020-11-30 02:20:20,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 02:20:20,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:20,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 02:20:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:20:20,458 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 13 states. [2020-11-30 02:20:20,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:20,845 INFO L93 Difference]: Finished difference Result 82 states and 197 transitions. [2020-11-30 02:20:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 02:20:20,846 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-11-30 02:20:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:20,847 INFO L225 Difference]: With dead ends: 82 [2020-11-30 02:20:20,847 INFO L226 Difference]: Without dead ends: 56 [2020-11-30 02:20:20,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:20:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-30 02:20:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2020-11-30 02:20:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-30 02:20:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-30 02:20:20,863 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-11-30 02:20:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:20,864 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-30 02:20:20,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 02:20:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-30 02:20:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:20:20,867 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:20,868 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:21,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 02:20:21,084 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1230025166, now seen corresponding path program 6 times [2020-11-30 02:20:21,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:21,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276956744] [2020-11-30 02:20:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:21,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276956744] [2020-11-30 02:20:21,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470539324] [2020-11-30 02:20:21,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:21,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:20:21,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:20:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:20:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:20:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:21,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:20:21,369 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:21,370 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:21,414 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:21,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:21,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:21,515 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:21,546 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:21,579 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:21,580 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:21,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2028290853] [2020-11-30 02:20:21,623 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:20:21,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:20:21,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2020-11-30 02:20:21,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730182965] [2020-11-30 02:20:21,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 02:20:21,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 02:20:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:20:21,625 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 16 states. [2020-11-30 02:20:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:22,046 INFO L93 Difference]: Finished difference Result 91 states and 202 transitions. [2020-11-30 02:20:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:20:22,047 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-11-30 02:20:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:22,048 INFO L225 Difference]: With dead ends: 91 [2020-11-30 02:20:22,049 INFO L226 Difference]: Without dead ends: 66 [2020-11-30 02:20:22,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:20:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-30 02:20:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-30 02:20:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 02:20:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 136 transitions. [2020-11-30 02:20:22,057 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 136 transitions. Word has length 14 [2020-11-30 02:20:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:22,058 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 136 transitions. [2020-11-30 02:20:22,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 02:20:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 136 transitions. [2020-11-30 02:20:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:20:22,059 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:22,059 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:22,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:22,260 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:22,260 INFO L82 PathProgramCache]: Analyzing trace with hash 415819444, now seen corresponding path program 7 times [2020-11-30 02:20:22,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:22,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067812651] [2020-11-30 02:20:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:22,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067812651] [2020-11-30 02:20:22,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278151131] [2020-11-30 02:20:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:22,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:20:22,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:20:22,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 02:20:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:22,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:20:22,567 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:22,567 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:22,595 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:22,595 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:22,623 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:22,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1044347793] [2020-11-30 02:20:22,727 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:20:22,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:20:22,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2020-11-30 02:20:22,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302566392] [2020-11-30 02:20:22,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 02:20:22,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:22,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 02:20:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:20:22,730 INFO L87 Difference]: Start difference. First operand 58 states and 136 transitions. Second operand 17 states. [2020-11-30 02:20:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:23,534 INFO L93 Difference]: Finished difference Result 157 states and 377 transitions. [2020-11-30 02:20:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-30 02:20:23,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-30 02:20:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:23,536 INFO L225 Difference]: With dead ends: 157 [2020-11-30 02:20:23,537 INFO L226 Difference]: Without dead ends: 108 [2020-11-30 02:20:23,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=478, Invalid=1004, Unknown=0, NotChecked=0, Total=1482 [2020-11-30 02:20:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-30 02:20:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 65. [2020-11-30 02:20:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-30 02:20:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-11-30 02:20:23,553 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 14 [2020-11-30 02:20:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:23,554 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-11-30 02:20:23,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 02:20:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-11-30 02:20:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 02:20:23,555 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:23,555 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:23,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:23,780 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1483738395, now seen corresponding path program 8 times [2020-11-30 02:20:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:23,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277490190] [2020-11-30 02:20:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:23,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277490190] [2020-11-30 02:20:23,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126001177] [2020-11-30 02:20:23,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:24,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-30 02:20:24,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:20:24,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:20:24,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:20:24,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:20:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:24,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:20:24,127 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:24,127 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:24,155 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:24,156 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:24,185 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:24,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [664312954] [2020-11-30 02:20:24,411 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:20:24,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:20:24,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2020-11-30 02:20:24,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94534519] [2020-11-30 02:20:24,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-30 02:20:24,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:24,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-30 02:20:24,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:20:24,414 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 25 states. [2020-11-30 02:20:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:25,671 INFO L93 Difference]: Finished difference Result 210 states and 515 transitions. [2020-11-30 02:20:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-30 02:20:25,672 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 17 [2020-11-30 02:20:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:25,673 INFO L225 Difference]: With dead ends: 210 [2020-11-30 02:20:25,674 INFO L226 Difference]: Without dead ends: 129 [2020-11-30 02:20:25,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1117, Invalid=2423, Unknown=0, NotChecked=0, Total=3540 [2020-11-30 02:20:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-30 02:20:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 64. [2020-11-30 02:20:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-30 02:20:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-11-30 02:20:25,685 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 17 [2020-11-30 02:20:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:25,685 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-11-30 02:20:25,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-30 02:20:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-11-30 02:20:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 02:20:25,686 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:25,687 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:25,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:25,904 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash -154578414, now seen corresponding path program 9 times [2020-11-30 02:20:25,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:25,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927841641] [2020-11-30 02:20:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:26,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927841641] [2020-11-30 02:20:26,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091662567] [2020-11-30 02:20:26,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:26,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:20:26,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:20:26,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 02:20:26,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:20:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:26,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:20:26,403 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:26,404 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,468 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,498 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,526 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,550 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,594 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,621 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,626 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,634 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,636 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,641 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,644 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,649 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,664 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,668 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,671 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,676 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,679 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,683 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:26,683 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:26,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1720303577] [2020-11-30 02:20:26,727 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:20:26,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:20:26,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 26 [2020-11-30 02:20:26,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79383225] [2020-11-30 02:20:26,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-30 02:20:26,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-30 02:20:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2020-11-30 02:20:26,732 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 28 states. [2020-11-30 02:20:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:27,528 INFO L93 Difference]: Finished difference Result 133 states and 298 transitions. [2020-11-30 02:20:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-30 02:20:27,529 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 26 [2020-11-30 02:20:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:27,530 INFO L225 Difference]: With dead ends: 133 [2020-11-30 02:20:27,530 INFO L226 Difference]: Without dead ends: 108 [2020-11-30 02:20:27,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=797, Invalid=1753, Unknown=0, NotChecked=0, Total=2550 [2020-11-30 02:20:27,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-30 02:20:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2020-11-30 02:20:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-30 02:20:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 208 transitions. [2020-11-30 02:20:27,537 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 208 transitions. Word has length 26 [2020-11-30 02:20:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:27,538 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 208 transitions. [2020-11-30 02:20:27,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-30 02:20:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 208 transitions. [2020-11-30 02:20:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 02:20:27,539 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:27,539 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:27,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-30 02:20:27,740 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:27,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1558563116, now seen corresponding path program 10 times [2020-11-30 02:20:27,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:27,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356534317] [2020-11-30 02:20:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:28,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356534317] [2020-11-30 02:20:28,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623114913] [2020-11-30 02:20:28,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:28,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 02:20:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:20:28,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 02:20:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:28,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:20:28,355 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:28,355 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:28,380 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:20:28,381 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:28,405 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:20:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:20:28,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [500583301] [2020-11-30 02:20:28,600 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:20:28,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:20:28,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2020-11-30 02:20:28,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657887397] [2020-11-30 02:20:28,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-30 02:20:28,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:28,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-30 02:20:28,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2020-11-30 02:20:28,608 INFO L87 Difference]: Start difference. First operand 88 states and 208 transitions. Second operand 30 states. [2020-11-30 02:20:30,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:30,209 INFO L93 Difference]: Finished difference Result 232 states and 561 transitions. [2020-11-30 02:20:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-30 02:20:30,210 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 26 [2020-11-30 02:20:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:30,212 INFO L225 Difference]: With dead ends: 232 [2020-11-30 02:20:30,212 INFO L226 Difference]: Without dead ends: 181 [2020-11-30 02:20:30,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1817, Invalid=4035, Unknown=0, NotChecked=0, Total=5852 [2020-11-30 02:20:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-11-30 02:20:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 81. [2020-11-30 02:20:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 02:20:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-11-30 02:20:30,221 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 26 [2020-11-30 02:20:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:30,222 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-11-30 02:20:30,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-30 02:20:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-11-30 02:20:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 02:20:30,223 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:20:30,223 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:20:30,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:30,440 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:20:30,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:20:30,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1345428627, now seen corresponding path program 11 times [2020-11-30 02:20:30,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:20:30,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613319278] [2020-11-30 02:20:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:20:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:20:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:30,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613319278] [2020-11-30 02:20:30,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983354111] [2020-11-30 02:20:30,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:30,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-30 02:20:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:20:30,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:20:30,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:20:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:30,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:20:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:20:30,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:20:30,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [13] total 14 [2020-11-30 02:20:30,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169921807] [2020-11-30 02:20:30,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 02:20:30,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:20:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 02:20:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:20:30,851 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 13 states. [2020-11-30 02:20:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:20:30,880 INFO L93 Difference]: Finished difference Result 319 states and 733 transitions. [2020-11-30 02:20:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 02:20:30,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-11-30 02:20:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:20:30,881 INFO L225 Difference]: With dead ends: 319 [2020-11-30 02:20:30,881 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:20:30,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:20:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:20:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:20:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:20:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:20:30,882 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-11-30 02:20:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:20:30,883 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:20:30,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 02:20:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:20:30,883 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:20:31,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:20:31,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:20:31 BasicIcfg [2020-11-30 02:20:31,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:20:31,096 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:20:31,096 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:20:31,096 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:20:31,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:20:15" (3/4) ... [2020-11-30 02:20:31,101 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:20:31,109 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-11-30 02:20:31,109 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-11-30 02:20:31,118 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-30 02:20:31,119 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 02:20:31,120 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:20:31,120 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:20:31,187 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b98dd7bd-b22c-4588-8304-944d03abc91b/bin/utaipan/witness.graphml [2020-11-30 02:20:31,187 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:20:31,189 INFO L168 Benchmark]: Toolchain (without parser) took 17222.15 ms. Allocated memory was 92.3 MB in the beginning and 234.9 MB in the end (delta: 142.6 MB). Free memory was 56.9 MB in the beginning and 167.7 MB in the end (delta: -110.8 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:20:31,190 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 74.3 MB in the beginning and 74.3 MB in the end (delta: 61.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:20:31,190 INFO L168 Benchmark]: CACSL2BoogieTranslator took 851.17 ms. Allocated memory is still 92.3 MB. Free memory was 56.7 MB in the beginning and 50.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:20:31,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.61 ms. Allocated memory is still 92.3 MB. Free memory was 50.9 MB in the beginning and 48.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:20:31,195 INFO L168 Benchmark]: Boogie Preprocessor took 32.46 ms. Allocated memory is still 92.3 MB. Free memory was 48.9 MB in the beginning and 47.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:20:31,196 INFO L168 Benchmark]: RCFGBuilder took 581.50 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 47.7 MB in the beginning and 82.6 MB in the end (delta: -34.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:20:31,196 INFO L168 Benchmark]: TraceAbstraction took 15590.84 ms. Allocated memory was 111.1 MB in the beginning and 234.9 MB in the end (delta: 123.7 MB). Free memory was 82.0 MB in the beginning and 169.7 MB in the end (delta: -87.8 MB). Peak memory consumption was 37.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:20:31,197 INFO L168 Benchmark]: Witness Printer took 91.65 ms. Allocated memory is still 234.9 MB. Free memory was 169.7 MB in the beginning and 167.7 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:20:31,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 74.3 MB in the beginning and 74.3 MB in the end (delta: 61.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 851.17 ms. Allocated memory is still 92.3 MB. Free memory was 56.7 MB in the beginning and 50.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.61 ms. Allocated memory is still 92.3 MB. Free memory was 50.9 MB in the beginning and 48.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.46 ms. Allocated memory is still 92.3 MB. Free memory was 48.9 MB in the beginning and 47.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 581.50 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 47.7 MB in the beginning and 82.6 MB in the end (delta: -34.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15590.84 ms. Allocated memory was 111.1 MB in the beginning and 234.9 MB in the end (delta: 123.7 MB). Free memory was 82.0 MB in the beginning and 169.7 MB in the end (delta: -87.8 MB). Peak memory consumption was 37.9 MB. Max. memory is 16.1 GB. * Witness Printer took 91.65 ms. Allocated memory is still 234.9 MB. Free memory was 169.7 MB in the beginning and 167.7 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 751 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 13 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 10 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.5s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 60 TotalNumberOfCompositions, 1062 MoverChecksTotal - PositiveResult [Line: 693]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.4s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 240 SDtfs, 971 SDslu, 740 SDs, 0 SdLazy, 771 SolverSat, 617 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 525 GetRequests, 206 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3948 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=11, 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, 13 MinimizatonAttempts, 310 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 328 NumberOfCodeBlocks, 328 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 438 ConstructedInterpolants, 0 QuantifiedInterpolants, 34838 SizeOfPredicates, 56 NumberOfNonLiveVariables, 951 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 27 InterpolantComputations, 8 PerfectInterpolantSequences, 302/831 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...