./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P --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 c4525591fa85ffc9750f318a48c09fdd29dc0d26cd65c6303a681f57303fc1a4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:56:21,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:56:21,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:56:21,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:56:21,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:56:21,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:56:21,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:56:21,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:56:21,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:56:21,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:56:21,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:56:21,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:56:21,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:56:21,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:56:21,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:56:21,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:56:21,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:56:21,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:56:21,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:56:21,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:56:21,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:56:21,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:56:21,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:56:21,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:56:21,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:56:21,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:56:21,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:56:21,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:56:21,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:56:21,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:56:21,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:56:21,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:56:21,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:56:21,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:56:21,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:56:21,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:56:21,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:56:21,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:56:21,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:56:21,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:56:21,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:56:21,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:56:21,681 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:56:21,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:56:21,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:56:21,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:56:21,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:56:21,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:56:21,684 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:56:21,685 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:56:21,685 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:56:21,685 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:56:21,686 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:56:21,686 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:56:21,686 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:56:21,687 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:56:21,687 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:56:21,687 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:56:21,687 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:56:21,689 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:56:21,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:56:21,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:56:21,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:56:21,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:56:21,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:56:21,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:56:21,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:56:21,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:56:21,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:56:21,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:56:21,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:56:21,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:56:21,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:56:21,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:56:21,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:56:21,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:56:21,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:56:21,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:56:21,695 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:56:21,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:56:21,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:56:21,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:56:21,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:56:21,696 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_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4525591fa85ffc9750f318a48c09fdd29dc0d26cd65c6303a681f57303fc1a4 [2021-11-21 00:56:22,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:56:22,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:56:22,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:56:22,054 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:56:22,055 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:56:22,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/pthread/fib_unsafe-12.i [2021-11-21 00:56:22,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data/38b4e995b/44eddf653a814974b7980dccf2389dbb/FLAG6fe4a9265 [2021-11-21 00:56:22,878 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:56:22,879 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/sv-benchmarks/c/pthread/fib_unsafe-12.i [2021-11-21 00:56:22,897 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data/38b4e995b/44eddf653a814974b7980dccf2389dbb/FLAG6fe4a9265 [2021-11-21 00:56:23,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data/38b4e995b/44eddf653a814974b7980dccf2389dbb [2021-11-21 00:56:23,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:56:23,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:56:23,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:56:23,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:56:23,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:56:23,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1fe11a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23, skipping insertion in model container [2021-11-21 00:56:23,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:56:23,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:56:23,684 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/sv-benchmarks/c/pthread/fib_unsafe-12.i[30813,30826] [2021-11-21 00:56:23,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:56:23,697 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:56:23,763 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/sv-benchmarks/c/pthread/fib_unsafe-12.i[30813,30826] [2021-11-21 00:56:23,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:56:23,814 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:56:23,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23 WrapperNode [2021-11-21 00:56:23,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:56:23,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:56:23,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:56:23,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:56:23,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,892 INFO L137 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-11-21 00:56:23,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:56:23,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:56:23,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:56:23,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:56:23,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:56:23,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:56:23,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:56:23,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:56:23,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (1/1) ... [2021-11-21 00:56:23,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:56:23,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:23,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:56:24,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:56:24,043 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-21 00:56:24,043 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-21 00:56:24,043 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-21 00:56:24,044 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-21 00:56:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:56:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-21 00:56:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:56:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:56:24,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:56:24,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:56:24,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-21 00:56:24,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:56:24,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:56:24,047 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-21 00:56:24,236 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:56:24,238 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:56:24,403 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:56:24,411 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:56:24,411 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:56:24,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:56:24 BoogieIcfgContainer [2021-11-21 00:56:24,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:56:24,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:56:24,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:56:24,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:56:24,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:56:23" (1/3) ... [2021-11-21 00:56:24,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c33154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:56:24, skipping insertion in model container [2021-11-21 00:56:24,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:23" (2/3) ... [2021-11-21 00:56:24,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c33154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:56:24, skipping insertion in model container [2021-11-21 00:56:24,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:56:24" (3/3) ... [2021-11-21 00:56:24,422 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2021-11-21 00:56:24,427 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-21 00:56:24,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:56:24,428 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:56:24,428 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-21 00:56:24,456 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,456 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,456 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,456 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,457 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,457 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,457 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,457 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,458 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,458 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,458 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,458 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,459 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,459 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,459 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,460 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,460 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,460 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,461 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,461 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,461 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,461 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,461 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,462 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,462 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,462 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,462 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,463 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,463 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,463 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,463 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,464 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,464 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,464 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,464 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,465 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,468 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,468 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,468 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,469 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,469 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,472 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,472 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,473 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,473 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,473 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:56:24,474 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-21 00:56:24,533 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:56:24,541 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:56:24,541 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 00:56:24,569 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-21 00:56:24,584 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 96 transitions, 202 flow [2021-11-21 00:56:24,588 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 96 transitions, 202 flow [2021-11-21 00:56:24,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2021-11-21 00:56:24,645 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-11-21 00:56:24,645 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-21 00:56:24,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-11-21 00:56:24,655 INFO L116 LiptonReduction]: Number of co-enabled transitions 1870 [2021-11-21 00:56:28,125 INFO L131 LiptonReduction]: Checked pairs total: 1462 [2021-11-21 00:56:28,125 INFO L133 LiptonReduction]: Total number of compositions: 92 [2021-11-21 00:56:28,142 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-11-21 00:56:28,167 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:56:28,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:28,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:56:28,178 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:56:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2083717598, now seen corresponding path program 1 times [2021-11-21 00:56:28,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:28,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019881717] [2021-11-21 00:56:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:28,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:28,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:28,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019881717] [2021-11-21 00:56:28,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019881717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:56:28,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:56:28,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:56:28,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867542971] [2021-11-21 00:56:28,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:56:28,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:56:28,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:56:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:56:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:56:28,528 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:28,598 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2021-11-21 00:56:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:56:28,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:56:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:28,614 INFO L225 Difference]: With dead ends: 44 [2021-11-21 00:56:28,614 INFO L226 Difference]: Without dead ends: 44 [2021-11-21 00:56:28,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:56:28,620 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:28,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:56:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-21 00:56:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-21 00:56:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2021-11-21 00:56:28,675 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 6 [2021-11-21 00:56:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:28,676 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2021-11-21 00:56:28,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2021-11-21 00:56:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:56:28,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:28,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:28,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:56:28,680 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:56:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash -170735922, now seen corresponding path program 1 times [2021-11-21 00:56:28,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:28,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068821155] [2021-11-21 00:56:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:28,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:28,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:28,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068821155] [2021-11-21 00:56:28,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068821155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:56:28,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581822403] [2021-11-21 00:56:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:28,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:28,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:28,804 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:28,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:56:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:56:28,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:28,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:29,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581822403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:29,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525019736] [2021-11-21 00:56:29,049 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 00:56:29,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:56:29,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-21 00:56:29,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334402662] [2021-11-21 00:56:29,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:29,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:56:29,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:56:29,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:56:29,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:56:29,069 INFO L87 Difference]: Start difference. First operand 44 states and 122 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:29,160 INFO L93 Difference]: Finished difference Result 71 states and 203 transitions. [2021-11-21 00:56:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:56:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:56:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:29,163 INFO L225 Difference]: With dead ends: 71 [2021-11-21 00:56:29,163 INFO L226 Difference]: Without dead ends: 71 [2021-11-21 00:56:29,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:56:29,165 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:29,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:56:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-21 00:56:29,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-21 00:56:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.9) internal successors, (203), 70 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 203 transitions. [2021-11-21 00:56:29,200 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 203 transitions. Word has length 7 [2021-11-21 00:56:29,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:29,200 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 203 transitions. [2021-11-21 00:56:29,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 203 transitions. [2021-11-21 00:56:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:56:29,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:29,202 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:29,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:29,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:29,416 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:56:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1152399070, now seen corresponding path program 2 times [2021-11-21 00:56:29,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:29,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17436863] [2021-11-21 00:56:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:29,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:29,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:29,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17436863] [2021-11-21 00:56:29,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17436863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:56:29,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10564715] [2021-11-21 00:56:29,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:56:29,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:29,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:29,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:56:29,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:56:29,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:29,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:56:29,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:29,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:29,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10564715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:29,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1201522711] [2021-11-21 00:56:29,795 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 00:56:29,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:56:29,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-21 00:56:29,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131726740] [2021-11-21 00:56:29,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:29,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:56:29,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:56:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:56:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:56:29,805 INFO L87 Difference]: Start difference. First operand 71 states and 203 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:29,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:29,959 INFO L93 Difference]: Finished difference Result 125 states and 365 transitions. [2021-11-21 00:56:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:56:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 00:56:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:29,972 INFO L225 Difference]: With dead ends: 125 [2021-11-21 00:56:29,972 INFO L226 Difference]: Without dead ends: 125 [2021-11-21 00:56:29,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:56:29,978 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 123 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:29,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:56:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-21 00:56:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-21 00:56:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.943548387096774) internal successors, (365), 124 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 365 transitions. [2021-11-21 00:56:30,014 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 365 transitions. Word has length 10 [2021-11-21 00:56:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:30,015 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 365 transitions. [2021-11-21 00:56:30,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 365 transitions. [2021-11-21 00:56:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 00:56:30,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:30,017 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:30,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:30,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:30,218 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:56:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash -981423710, now seen corresponding path program 3 times [2021-11-21 00:56:30,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:30,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965426509] [2021-11-21 00:56:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:30,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:30,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:30,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965426509] [2021-11-21 00:56:30,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965426509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:56:30,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159434632] [2021-11-21 00:56:30,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:56:30,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:30,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:30,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:30,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:56:30,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:56:30,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:30,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:56:30,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:30,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:30,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159434632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:30,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285900166] [2021-11-21 00:56:30,753 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 00:56:30,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:56:30,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-21 00:56:30,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680293163] [2021-11-21 00:56:30,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:30,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 00:56:30,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:56:30,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 00:56:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:56:30,760 INFO L87 Difference]: Start difference. First operand 125 states and 365 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:31,065 INFO L93 Difference]: Finished difference Result 233 states and 689 transitions. [2021-11-21 00:56:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:56:31,065 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 00:56:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:31,070 INFO L225 Difference]: With dead ends: 233 [2021-11-21 00:56:31,070 INFO L226 Difference]: Without dead ends: 233 [2021-11-21 00:56:31,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:56:31,074 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 321 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:31,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 0 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:56:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-21 00:56:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-21 00:56:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.9698275862068964) internal successors, (689), 232 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 689 transitions. [2021-11-21 00:56:31,121 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 689 transitions. Word has length 16 [2021-11-21 00:56:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:31,122 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 689 transitions. [2021-11-21 00:56:31,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 689 transitions. [2021-11-21 00:56:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:56:31,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:31,131 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:31,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:31,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:31,344 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:56:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash 2081114786, now seen corresponding path program 4 times [2021-11-21 00:56:31,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:31,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601070605] [2021-11-21 00:56:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:31,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:31,776 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:31,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601070605] [2021-11-21 00:56:31,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601070605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:56:31,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996358926] [2021-11-21 00:56:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:56:31,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:31,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:31,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:31,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:56:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:31,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:56:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:32,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:32,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996358926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:32,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698735229] [2021-11-21 00:56:32,260 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 00:56:32,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:56:32,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2021-11-21 00:56:32,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808643458] [2021-11-21 00:56:32,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:32,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:56:32,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:56:32,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:56:32,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:56:32,265 INFO L87 Difference]: Start difference. First operand 233 states and 689 transitions. Second operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:32,605 INFO L93 Difference]: Finished difference Result 269 states and 797 transitions. [2021-11-21 00:56:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 00:56:32,606 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-21 00:56:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:32,615 INFO L225 Difference]: With dead ends: 269 [2021-11-21 00:56:32,616 INFO L226 Difference]: Without dead ends: 269 [2021-11-21 00:56:32,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:56:32,620 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 429 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:32,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 0 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:56:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-21 00:56:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-11-21 00:56:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.9738805970149254) internal successors, (797), 268 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 797 transitions. [2021-11-21 00:56:32,647 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 797 transitions. Word has length 28 [2021-11-21 00:56:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:32,653 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 797 transitions. [2021-11-21 00:56:32,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 797 transitions. [2021-11-21 00:56:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 00:56:32,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:32,658 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:32,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:32,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:32,872 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:56:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:32,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1701587550, now seen corresponding path program 5 times [2021-11-21 00:56:32,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:32,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826612497] [2021-11-21 00:56:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:32,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:34,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826612497] [2021-11-21 00:56:34,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826612497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:56:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863640690] [2021-11-21 00:56:34,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:56:34,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:34,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:34,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:34,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:56:34,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-21 00:56:34,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:34,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-21 00:56:34,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:36,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:57:44,283 WARN L227 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:59:15,743 WARN L227 SmtUtils]: Spent 52.05s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:02:11,817 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-21 01:02:11,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-21 01:02:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112195605] [2021-11-21 01:02:11,819 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:02:11,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:02:11,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-21 01:02:11,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138690636] [2021-11-21 01:02:11,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:11,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 01:02:11,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:11,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 01:02:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=4338, Unknown=37, NotChecked=0, Total=5256 [2021-11-21 01:02:11,825 INFO L87 Difference]: Start difference. First operand 269 states and 797 transitions. Second operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:11,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-21 01:02:11,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 152.5s TimeCoverageRelationStatistics Valid=881, Invalid=4338, Unknown=37, NotChecked=0, Total=5256 [2021-11-21 01:02:11,832 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:11,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:02:11,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:12,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:12,034 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:435) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:425) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:885) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) Caused by: java.io.IOException: Stream Closed at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 37 more [2021-11-21 01:02:12,036 INFO L158 Benchmark]: Toolchain (without parser) took 348881.45ms. Allocated memory was 94.4MB in the beginning and 163.6MB in the end (delta: 69.2MB). Free memory was 52.5MB in the beginning and 133.3MB in the end (delta: -80.8MB). Peak memory consumption was 82.4MB. Max. memory is 16.1GB. [2021-11-21 01:02:12,037 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 94.4MB. Free memory was 70.3MB in the beginning and 70.3MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:02:12,037 INFO L158 Benchmark]: CACSL2BoogieTranslator took 649.65ms. Allocated memory is still 94.4MB. Free memory was 52.3MB in the beginning and 61.1MB in the end (delta: -8.8MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2021-11-21 01:02:12,038 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.07ms. Allocated memory is still 94.4MB. Free memory was 61.1MB in the beginning and 59.2MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:02:12,038 INFO L158 Benchmark]: Boogie Preprocessor took 58.79ms. Allocated memory is still 94.4MB. Free memory was 59.2MB in the beginning and 57.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:02:12,038 INFO L158 Benchmark]: RCFGBuilder took 460.81ms. Allocated memory is still 94.4MB. Free memory was 57.6MB in the beginning and 45.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 01:02:12,039 INFO L158 Benchmark]: TraceAbstraction took 347620.46ms. Allocated memory was 94.4MB in the beginning and 163.6MB in the end (delta: 69.2MB). Free memory was 44.9MB in the beginning and 133.3MB in the end (delta: -88.4MB). Peak memory consumption was 77.9MB. Max. memory is 16.1GB. [2021-11-21 01:02:12,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 94.4MB. Free memory was 70.3MB in the beginning and 70.3MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 649.65ms. Allocated memory is still 94.4MB. Free memory was 52.3MB in the beginning and 61.1MB in the end (delta: -8.8MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.07ms. Allocated memory is still 94.4MB. Free memory was 61.1MB in the beginning and 59.2MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 58.79ms. Allocated memory is still 94.4MB. Free memory was 59.2MB in the beginning and 57.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 460.81ms. Allocated memory is still 94.4MB. Free memory was 57.6MB in the beginning and 45.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 347620.46ms. Allocated memory was 94.4MB in the beginning and 163.6MB in the end (delta: 69.2MB). Free memory was 44.9MB in the beginning and 133.3MB in the end (delta: -88.4MB). Peak memory consumption was 77.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 96 PlacesBefore, 20 PlacesAfterwards, 96 TransitionsBefore, 16 TransitionsAfterwards, 1870 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 92 TotalNumberOfCompositions, 1462 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1325, positive: 1316, positive conditional: 0, positive unconditional: 1316, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1176, positive: 1168, positive conditional: 0, positive unconditional: 1168, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1176, positive: 1168, positive conditional: 0, positive unconditional: 1168, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 18, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1325, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 1176, unknown conditional: 0, unknown unconditional: 1176] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P --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 c4525591fa85ffc9750f318a48c09fdd29dc0d26cd65c6303a681f57303fc1a4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:02:14,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:02:14,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:02:14,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:02:14,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:02:14,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:02:14,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:02:14,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:02:14,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:02:14,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:02:14,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:02:14,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:02:14,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:02:14,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:02:14,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:02:14,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:02:14,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:02:14,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:02:14,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:02:14,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:02:14,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:02:14,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:02:14,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:02:14,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:02:15,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:02:15,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:02:15,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:02:15,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:02:15,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:02:15,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:02:15,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:02:15,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:02:15,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:02:15,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:02:15,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:02:15,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:02:15,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:02:15,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:02:15,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:02:15,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:02:15,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:02:15,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 01:02:15,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:02:15,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:02:15,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:02:15,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:02:15,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:02:15,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:02:15,089 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:02:15,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:02:15,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:02:15,090 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:02:15,092 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:02:15,092 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:02:15,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:02:15,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:02:15,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:02:15,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:02:15,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:02:15,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:02:15,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:02:15,096 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:02:15,096 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:02:15,097 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:02:15,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:02:15,097 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:02:15,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:02:15,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:02:15,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:02:15,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:02:15,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:02:15,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:02:15,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:02:15,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:02:15,101 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:02:15,101 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:02:15,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:02:15,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:02:15,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:02:15,102 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4525591fa85ffc9750f318a48c09fdd29dc0d26cd65c6303a681f57303fc1a4 [2021-11-21 01:02:15,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:02:15,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:02:15,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:02:15,674 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:02:15,675 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:02:15,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/pthread/fib_unsafe-12.i [2021-11-21 01:02:15,788 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data/c63c43a32/6b34605a6c1b4a94b01e0170ca613457/FLAGd71a2e322 [2021-11-21 01:02:16,611 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:02:16,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/sv-benchmarks/c/pthread/fib_unsafe-12.i [2021-11-21 01:02:16,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data/c63c43a32/6b34605a6c1b4a94b01e0170ca613457/FLAGd71a2e322 [2021-11-21 01:02:16,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/data/c63c43a32/6b34605a6c1b4a94b01e0170ca613457 [2021-11-21 01:02:16,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:02:16,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:02:16,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:02:16,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:02:16,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:02:16,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7b5b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16, skipping insertion in model container [2021-11-21 01:02:16,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:02:16,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:02:17,505 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/sv-benchmarks/c/pthread/fib_unsafe-12.i[30813,30826] [2021-11-21 01:02:17,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:02:17,528 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:02:17,609 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/sv-benchmarks/c/pthread/fib_unsafe-12.i[30813,30826] [2021-11-21 01:02:17,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:02:17,688 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:02:17,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17 WrapperNode [2021-11-21 01:02:17,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:02:17,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:02:17,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:02:17,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:02:17,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,786 INFO L137 Inliner]: procedures = 167, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-11-21 01:02:17,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:02:17,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:02:17,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:02:17,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:02:17,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:02:17,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:02:17,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:02:17,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:02:17,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (1/1) ... [2021-11-21 01:02:17,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:02:17,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:17,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:02:17,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:02:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-21 01:02:17,966 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-21 01:02:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-21 01:02:17,967 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-21 01:02:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-21 01:02:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:02:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:02:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:02:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:02:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:02:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-21 01:02:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:02:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:02:17,971 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-21 01:02:18,107 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:02:18,109 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:02:18,333 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:02:18,341 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:02:18,342 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:02:18,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:02:18 BoogieIcfgContainer [2021-11-21 01:02:18,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:02:18,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:02:18,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:02:18,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:02:18,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:02:16" (1/3) ... [2021-11-21 01:02:18,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36688e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:02:18, skipping insertion in model container [2021-11-21 01:02:18,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:17" (2/3) ... [2021-11-21 01:02:18,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36688e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:02:18, skipping insertion in model container [2021-11-21 01:02:18,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:02:18" (3/3) ... [2021-11-21 01:02:18,354 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2021-11-21 01:02:18,359 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-21 01:02:18,360 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:02:18,360 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:02:18,360 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-21 01:02:18,394 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,395 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,395 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,396 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,396 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,396 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,397 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,397 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,398 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,398 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,399 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,399 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,399 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,400 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,400 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,401 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,401 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,401 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,402 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,402 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,402 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,403 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,403 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,403 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,404 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,404 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,405 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,405 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,405 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,406 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,406 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,406 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,407 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,407 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,408 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,408 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,411 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,412 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,412 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,413 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,413 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,419 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,428 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,428 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,428 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,429 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:02:18,430 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-21 01:02:18,499 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:02:18,509 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:02:18,509 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 01:02:18,530 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-21 01:02:18,572 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 96 transitions, 202 flow [2021-11-21 01:02:18,575 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 96 transitions, 202 flow [2021-11-21 01:02:18,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2021-11-21 01:02:18,655 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-11-21 01:02:18,655 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-21 01:02:18,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2021-11-21 01:02:18,666 INFO L116 LiptonReduction]: Number of co-enabled transitions 1826 [2021-11-21 01:02:25,265 INFO L131 LiptonReduction]: Checked pairs total: 1408 [2021-11-21 01:02:25,266 INFO L133 LiptonReduction]: Total number of compositions: 90 [2021-11-21 01:02:25,275 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-11-21 01:02:25,288 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:02:25,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:25,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:02:25,298 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 01:02:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2112376477, now seen corresponding path program 1 times [2021-11-21 01:02:25,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:02:25,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058144634] [2021-11-21 01:02:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:25,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:02:25,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:02:25,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:02:25,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:02:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:25,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:02:25,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:25,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:25,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:02:25,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058144634] [2021-11-21 01:02:25,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058144634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:25,586 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:25,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-21 01:02:25,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158013891] [2021-11-21 01:02:25,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:25,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:02:25,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:02:25,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:02:25,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:02:25,614 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:25,744 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2021-11-21 01:02:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:02:25,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:02:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:25,760 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:02:25,761 INFO L226 Difference]: Without dead ends: 53 [2021-11-21 01:02:25,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:02:25,766 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:25,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:02:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-21 01:02:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-21 01:02:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2021-11-21 01:02:25,832 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2021-11-21 01:02:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:25,833 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2021-11-21 01:02:25,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2021-11-21 01:02:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:02:25,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:25,836 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:25,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:26,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:02:26,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 01:02:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:26,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733347, now seen corresponding path program 1 times [2021-11-21 01:02:26,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:02:26,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193810114] [2021-11-21 01:02:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:26,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:02:26,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:02:26,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:02:26,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:02:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:26,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:02:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:26,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:26,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:02:26,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193810114] [2021-11-21 01:02:26,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193810114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:26,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [28374317] [2021-11-21 01:02:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:26,351 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:02:26,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:02:26,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:02:26,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-21 01:02:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:26,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:02:26,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:26,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:26,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [28374317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586394684] [2021-11-21 01:02:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:26,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:26,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:26,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:26,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:02:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:26,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:02:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:26,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:26,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586394684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:26,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:02:26,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-21 01:02:26,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784541243] [2021-11-21 01:02:26,816 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:26,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:02:26,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:02:26,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:02:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:02:26,818 INFO L87 Difference]: Start difference. First operand 53 states and 149 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:27,107 INFO L93 Difference]: Finished difference Result 89 states and 257 transitions. [2021-11-21 01:02:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:02:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:02:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:27,111 INFO L225 Difference]: With dead ends: 89 [2021-11-21 01:02:27,111 INFO L226 Difference]: Without dead ends: 89 [2021-11-21 01:02:27,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:02:27,113 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 120 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:27,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:02:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-21 01:02:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-21 01:02:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.9204545454545454) internal successors, (257), 88 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 257 transitions. [2021-11-21 01:02:27,130 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 257 transitions. Word has length 8 [2021-11-21 01:02:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:27,131 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 257 transitions. [2021-11-21 01:02:27,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 257 transitions. [2021-11-21 01:02:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:02:27,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:27,133 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:27,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 01:02:27,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:27,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-21 01:02:27,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:02:27,748 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 01:02:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1157383395, now seen corresponding path program 2 times [2021-11-21 01:02:27,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:02:27,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243897260] [2021-11-21 01:02:27,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:02:27,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:02:27,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:02:27,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:02:27,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:02:27,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:02:27,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:27,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:02:27,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:27,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:28,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:02:28,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243897260] [2021-11-21 01:02:28,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243897260] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:28,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [161837031] [2021-11-21 01:02:28,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:02:28,171 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:02:28,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:02:28,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:02:28,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-21 01:02:28,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:02:28,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:28,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:02:28,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:28,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:28,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [161837031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:28,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604381857] [2021-11-21 01:02:28,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:02:28,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:28,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:28,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:28,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:02:28,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:02:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:28,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:02:28,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:28,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:28,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604381857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:28,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:02:28,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-21 01:02:28,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955541666] [2021-11-21 01:02:28,622 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:28,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:02:28,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:02:28,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:02:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:02:28,624 INFO L87 Difference]: Start difference. First operand 89 states and 257 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:29,503 INFO L93 Difference]: Finished difference Result 161 states and 473 transitions. [2021-11-21 01:02:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:02:29,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 01:02:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:29,507 INFO L225 Difference]: With dead ends: 161 [2021-11-21 01:02:29,507 INFO L226 Difference]: Without dead ends: 161 [2021-11-21 01:02:29,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:02:29,509 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 318 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:29,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 0 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:02:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-21 01:02:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-21 01:02:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.95625) internal successors, (473), 160 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 473 transitions. [2021-11-21 01:02:29,530 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 473 transitions. Word has length 12 [2021-11-21 01:02:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:29,530 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 473 transitions. [2021-11-21 01:02:29,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 473 transitions. [2021-11-21 01:02:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:02:29,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:29,534 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:29,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:29,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:29,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:30,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:30,138 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 01:02:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash 64462563, now seen corresponding path program 3 times [2021-11-21 01:02:30,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:02:30,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138253120] [2021-11-21 01:02:30,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:02:30,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:02:30,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:02:30,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:02:30,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:02:30,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:02:30,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:30,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:02:30,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:30,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:31,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:02:31,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138253120] [2021-11-21 01:02:31,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138253120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1504697306] [2021-11-21 01:02:31,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:02:31,255 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:02:31,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:02:31,260 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:02:31,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 01:02:31,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:02:31,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:02:31,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:31,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:33,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1504697306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:33,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997054294] [2021-11-21 01:02:33,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:02:33,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:33,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:33,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:33,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:02:33,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:02:33,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:33,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:02:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:33,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:33,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997054294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:33,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:02:33,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 45 [2021-11-21 01:02:33,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876233301] [2021-11-21 01:02:33,369 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:33,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:02:33,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:02:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:02:33,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=1450, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:02:33,371 INFO L87 Difference]: Start difference. First operand 161 states and 473 transitions. Second operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:38,315 INFO L93 Difference]: Finished difference Result 305 states and 914 transitions. [2021-11-21 01:02:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-21 01:02:38,316 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-21 01:02:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:38,320 INFO L225 Difference]: With dead ends: 305 [2021-11-21 01:02:38,321 INFO L226 Difference]: Without dead ends: 305 [2021-11-21 01:02:38,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1115, Invalid=2545, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 01:02:38,324 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1788 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:38,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1788 Valid, 0 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:02:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-21 01:02:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-11-21 01:02:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0065789473684212) internal successors, (914), 304 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 914 transitions. [2021-11-21 01:02:38,355 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 914 transitions. Word has length 20 [2021-11-21 01:02:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:38,355 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 914 transitions. [2021-11-21 01:02:38,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 914 transitions. [2021-11-21 01:02:38,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:02:38,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:38,360 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:38,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-21 01:02:38,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-21 01:02:38,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:38,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:02:38,974 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 01:02:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1573643747, now seen corresponding path program 4 times [2021-11-21 01:02:38,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:02:38,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030785313] [2021-11-21 01:02:38,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:02:38,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:02:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:02:38,976 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:02:38,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:02:39,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:02:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:39,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-21 01:02:39,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:40,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:53,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:02:53,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030785313] [2021-11-21 01:02:53,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030785313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:53,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37702677] [2021-11-21 01:02:53,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:02:53,823 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:02:53,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:02:53,826 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:02:53,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-21 01:02:54,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:02:54,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:54,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-21 01:02:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:55,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:56,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [37702677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114770417] [2021-11-21 01:02:56,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:02:56,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:56,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:56,050 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:56,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f86ee1b-e2a9-4a88-aa6b-7a3666c3f38f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:02:56,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:02:56,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-21 01:02:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:57,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:57,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114770417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:57,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:02:57,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 27, 27] total 54 [2021-11-21 01:02:57,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907364563] [2021-11-21 01:02:57,888 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:57,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-21 01:02:57,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:02:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-21 01:02:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=2307, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:02:57,893 INFO L87 Difference]: Start difference. First operand 305 states and 914 transitions. Second operand has 56 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:03:09,697 WARN L227 SmtUtils]: Spent 7.27s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:03:26,530 WARN L227 SmtUtils]: Spent 7.83s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:03:40,410 WARN L227 SmtUtils]: Spent 8.51s on a formula simplification that was a NOOP. DAG size: 148 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:03:54,688 WARN L227 SmtUtils]: Spent 6.80s on a formula simplification that was a NOOP. DAG size: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:04:10,479 WARN L227 SmtUtils]: Spent 9.51s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:04:25,349 WARN L227 SmtUtils]: Spent 9.31s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:04:41,306 WARN L227 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:04:55,336 WARN L227 SmtUtils]: Spent 8.70s on a formula simplification that was a NOOP. DAG size: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:05:10,240 WARN L227 SmtUtils]: Spent 8.47s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:05:23,817 WARN L227 SmtUtils]: Spent 8.49s on a formula simplification that was a NOOP. DAG size: 153 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:05:39,595 WARN L227 SmtUtils]: Spent 5.90s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:05:51,885 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:06:07,395 WARN L227 SmtUtils]: Spent 9.22s on a formula simplification that was a NOOP. DAG size: 143 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:06:19,457 WARN L227 SmtUtils]: Spent 7.46s on a formula simplification that was a NOOP. DAG size: 149 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:06:33,788 WARN L227 SmtUtils]: Spent 8.77s on a formula simplification that was a NOOP. DAG size: 155 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:06:53,307 WARN L227 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:07:10,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:08:40,112 WARN L227 SmtUtils]: Spent 9.45s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:08:56,808 WARN L227 SmtUtils]: Spent 9.36s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:09:07,970 WARN L227 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 135 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:09:21,307 WARN L227 SmtUtils]: Spent 7.70s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:09:31,197 WARN L227 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 129 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:09:44,374 WARN L227 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)