./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.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_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/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_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/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_cc184045-00ec-4775-8643-7a6bb996c0b6/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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:00:02,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:00:02,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:00:02,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:00:02,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:00:02,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:00:02,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:00:02,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:00:02,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:00:02,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:00:02,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:00:02,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:00:02,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:00:02,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:00:02,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:00:02,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:00:02,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:00:02,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:00:02,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:00:02,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:00:02,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:00:02,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:00:02,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:00:02,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:00:02,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:00:02,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:00:02,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:00:02,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:00:02,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:00:02,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:00:02,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:00:02,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:00:02,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:00:02,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:00:02,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:00:02,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:00:02,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:00:02,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:00:02,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:00:02,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:00:02,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:00:02,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:00:02,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:00:02,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:00:02,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:00:02,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:00:02,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:00:02,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:00:02,730 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:00:02,730 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:00:02,730 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:00:02,731 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:00:02,732 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:00:02,732 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:00:02,732 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:00:02,732 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:00:02,733 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:00:02,733 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:00:02,733 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:00:02,733 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:00:02,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:00:02,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:00:02,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:00:02,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:00:02,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:00:02,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:00:02,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:00:02,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:00:02,737 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:00:02,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:00:02,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:00:02,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:00:02,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:00:02,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:00:02,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:02,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:00:02,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:00:02,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:00:02,740 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:00:02,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:00:02,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:00:02,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:00:02,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:00:02,741 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_cc184045-00ec-4775-8643-7a6bb996c0b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2021-11-21 01:00:03,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:00:03,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:00:03,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:00:03,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:00:03,077 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:00:03,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2021-11-21 01:00:03,150 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/data/293050365/49f6dccfd173449691b76f445fd079cf/FLAG0d4407abf [2021-11-21 01:00:03,873 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:00:03,883 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2021-11-21 01:00:03,908 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/data/293050365/49f6dccfd173449691b76f445fd079cf/FLAG0d4407abf [2021-11-21 01:00:04,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/data/293050365/49f6dccfd173449691b76f445fd079cf [2021-11-21 01:00:04,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:00:04,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:00:04,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:04,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:00:04,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:00:04,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:04" (1/1) ... [2021-11-21 01:00:04,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e882ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:04, skipping insertion in model container [2021-11-21 01:00:04,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:04" (1/1) ... [2021-11-21 01:00:04,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:00:04,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:00:04,417 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_cc184045-00ec-4775-8643-7a6bb996c0b6/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2021-11-21 01:00:04,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:04,910 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:00:04,924 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_cc184045-00ec-4775-8643-7a6bb996c0b6/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2021-11-21 01:00:04,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:05,149 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:00:05,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05 WrapperNode [2021-11-21 01:00:05,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:05,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:05,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:00:05,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:00:05,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,244 INFO L137 Inliner]: procedures = 364, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-11-21 01:00:05,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:05,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:00:05,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:00:05,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:00:05,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:00:05,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:00:05,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:00:05,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:00:05,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (1/1) ... [2021-11-21 01:00:05,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:05,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:05,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:00:05,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:00:05,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:00:05,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:00:05,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:00:05,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:00:05,388 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-11-21 01:00:05,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:00:05,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2021-11-21 01:00:05,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2021-11-21 01:00:05,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:00:05,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:00:05,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:00:05,391 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 01:00:05,517 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:00:05,519 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:00:05,797 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:00:05,805 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:00:05,806 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:00:05,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:05 BoogieIcfgContainer [2021-11-21 01:00:05,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:00:05,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:00:05,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:00:05,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:00:05,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:00:04" (1/3) ... [2021-11-21 01:00:05,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f2a037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:05, skipping insertion in model container [2021-11-21 01:00:05,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:05" (2/3) ... [2021-11-21 01:00:05,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f2a037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:05, skipping insertion in model container [2021-11-21 01:00:05,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:05" (3/3) ... [2021-11-21 01:00:05,818 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2021-11-21 01:00:05,824 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-21 01:00:05,824 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:00:05,825 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:00:05,825 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-21 01:00:05,855 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,856 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,856 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,856 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,857 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,857 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,857 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,857 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,858 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,858 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,858 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,858 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,859 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,859 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,859 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,859 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,860 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,860 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,860 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,860 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,861 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,861 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,861 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,862 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,862 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,862 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,862 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,863 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,863 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,863 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,863 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,864 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,864 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,864 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,864 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,865 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,865 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,865 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,865 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,866 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,866 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,866 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,866 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,866 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,867 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,867 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,871 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,871 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,871 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,871 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,872 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,872 WARN L322 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,872 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,872 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,872 WARN L322 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 01:00:05,879 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-11-21 01:00:05,951 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:00:05,959 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 01:00:05,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:00:05,976 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-21 01:00:05,992 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 97 transitions, 202 flow [2021-11-21 01:00:05,995 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 97 transitions, 202 flow [2021-11-21 01:00:05,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 97 transitions, 202 flow [2021-11-21 01:00:06,065 INFO L129 PetriNetUnfolder]: 7/96 cut-off events. [2021-11-21 01:00:06,066 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-11-21 01:00:06,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 7/96 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-11-21 01:00:06,073 INFO L116 LiptonReduction]: Number of co-enabled transitions 722 [2021-11-21 01:00:09,278 INFO L131 LiptonReduction]: Checked pairs total: 934 [2021-11-21 01:00:09,278 INFO L133 LiptonReduction]: Total number of compositions: 93 [2021-11-21 01:00:09,290 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2021-11-21 01:00:09,307 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 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 01:00:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 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 01:00:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:00:09,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:09,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:09,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:00:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1792519753, now seen corresponding path program 1 times [2021-11-21 01:00:09,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:09,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109732304] [2021-11-21 01:00:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:09,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:09,636 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 01:00:09,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:09,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109732304] [2021-11-21 01:00:09,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109732304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:09,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:09,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:00:09,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502291687] [2021-11-21 01:00:09,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:09,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:00:09,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:00:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:00:09,680 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 01:00:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:09,743 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2021-11-21 01:00:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:00:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 8 [2021-11-21 01:00:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:09,758 INFO L225 Difference]: With dead ends: 52 [2021-11-21 01:00:09,758 INFO L226 Difference]: Without dead ends: 52 [2021-11-21 01:00:09,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 01:00:09,765 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:09,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 5 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:00:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-21 01:00:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2021-11-21 01:00:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 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 01:00:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-11-21 01:00:09,807 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2021-11-21 01:00:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:09,807 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-11-21 01:00:09,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 01:00:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-11-21 01:00:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:00:09,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:09,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:09,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:00:09,810 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:00:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2022824329, now seen corresponding path program 1 times [2021-11-21 01:00:09,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:09,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423074983] [2021-11-21 01:00:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:09,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:09,889 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 01:00:09,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:09,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423074983] [2021-11-21 01:00:09,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423074983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:09,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132929520] [2021-11-21 01:00:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:09,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:09,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:09,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:09,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:00:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:00:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:00:10,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:00:10,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132929520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:10,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:00:10,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-21 01:00:10,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556027047] [2021-11-21 01:00:10,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:10,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:00:10,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:00:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:00:10,085 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 01:00:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:10,131 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2021-11-21 01:00:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:00:10,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-11-21 01:00:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:10,133 INFO L225 Difference]: With dead ends: 64 [2021-11-21 01:00:10,133 INFO L226 Difference]: Without dead ends: 64 [2021-11-21 01:00:10,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:00:10,135 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:10,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:00:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-21 01:00:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-11-21 01:00:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 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 01:00:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2021-11-21 01:00:10,154 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2021-11-21 01:00:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:10,154 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2021-11-21 01:00:10,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 01:00:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2021-11-21 01:00:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:00:10,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:10,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:10,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:10,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:10,356 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:00:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1257055464, now seen corresponding path program 1 times [2021-11-21 01:00:10,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:10,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874676220] [2021-11-21 01:00:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:10,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:00:10,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874676220] [2021-11-21 01:00:10,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874676220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101395098] [2021-11-21 01:00:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:10,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:10,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:10,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:10,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:00:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:00:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:00:10,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:00:10,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101395098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:10,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503028370] [2021-11-21 01:00:10,758 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 01:00:10,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:00:10,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-21 01:00:10,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960035091] [2021-11-21 01:00:10,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:10,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:00:10,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:10,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:00:10,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:10,764 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 01:00:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:10,888 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-11-21 01:00:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:00:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 15 [2021-11-21 01:00:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:10,895 INFO L225 Difference]: With dead ends: 109 [2021-11-21 01:00:10,895 INFO L226 Difference]: Without dead ends: 109 [2021-11-21 01:00:10,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 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 01:00:10,897 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:10,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 15 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:00:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-21 01:00:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-21 01:00:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.9814814814814814) internal successors, (214), 108 states have internal predecessors, (214), 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 01:00:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 214 transitions. [2021-11-21 01:00:10,926 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 214 transitions. Word has length 15 [2021-11-21 01:00:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:10,926 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 214 transitions. [2021-11-21 01:00:10,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 01:00:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 214 transitions. [2021-11-21 01:00:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:00:10,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:10,930 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:10,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:11,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:11,154 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:00:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2092616810, now seen corresponding path program 2 times [2021-11-21 01:00:11,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:11,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466199771] [2021-11-21 01:00:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:11,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:00:11,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:11,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466199771] [2021-11-21 01:00:11,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466199771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:11,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478430471] [2021-11-21 01:00:11,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:00:11,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:11,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:11,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:11,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:00:11,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:00:11,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:11,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:00:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:00:11,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:00:11,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478430471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:11,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1149973545] [2021-11-21 01:00:11,496 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 01:00:11,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:00:11,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-21 01:00:11,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623381302] [2021-11-21 01:00:11,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:11,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:00:11,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:00:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:11,503 INFO L87 Difference]: Start difference. First operand 109 states and 214 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 01:00:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:11,574 INFO L93 Difference]: Finished difference Result 289 states and 574 transitions. [2021-11-21 01:00:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:00:11,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 24 [2021-11-21 01:00:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:11,582 INFO L225 Difference]: With dead ends: 289 [2021-11-21 01:00:11,582 INFO L226 Difference]: Without dead ends: 289 [2021-11-21 01:00:11,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 01:00:11,591 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:11,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 14 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:00:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-21 01:00:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-21 01:00:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9930555555555556) internal successors, (574), 288 states have internal predecessors, (574), 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 01:00:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 574 transitions. [2021-11-21 01:00:11,642 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 574 transitions. Word has length 24 [2021-11-21 01:00:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:11,643 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 574 transitions. [2021-11-21 01:00:11,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 01:00:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 574 transitions. [2021-11-21 01:00:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:00:11,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:11,652 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:11,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:11,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:11,866 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:00:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:11,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1169239117, now seen corresponding path program 3 times [2021-11-21 01:00:11,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:11,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404523643] [2021-11-21 01:00:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:11,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:00:12,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404523643] [2021-11-21 01:00:12,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404523643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436856639] [2021-11-21 01:00:12,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:00:12,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:12,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:12,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:12,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:00:12,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:00:12,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:12,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:00:12,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:00:12,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:00:12,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436856639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:12,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [548346695] [2021-11-21 01:00:12,408 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 01:00:12,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:00:12,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-21 01:00:12,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769467731] [2021-11-21 01:00:12,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:12,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 01:00:12,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 01:00:12,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:00:12,412 INFO L87 Difference]: Start difference. First operand 289 states and 574 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 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 01:00:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:13,635 INFO L93 Difference]: Finished difference Result 864 states and 1724 transitions. [2021-11-21 01:00:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-21 01:00:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 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 36 [2021-11-21 01:00:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:13,641 INFO L225 Difference]: With dead ends: 864 [2021-11-21 01:00:13,641 INFO L226 Difference]: Without dead ends: 864 [2021-11-21 01:00:13,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1386, Invalid=3036, Unknown=0, NotChecked=0, Total=4422 [2021-11-21 01:00:13,645 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 616 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:13,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 50 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:00:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-11-21 01:00:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 778. [2021-11-21 01:00:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.9974259974259974) internal successors, (1552), 777 states have internal predecessors, (1552), 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 01:00:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1552 transitions. [2021-11-21 01:00:13,683 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1552 transitions. Word has length 36 [2021-11-21 01:00:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:13,683 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1552 transitions. [2021-11-21 01:00:13,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 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 01:00:13,684 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1552 transitions. [2021-11-21 01:00:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 01:00:13,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:13,704 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:13,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 01:00:13,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:13,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:00:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:13,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1458820033, now seen corresponding path program 4 times [2021-11-21 01:00:13,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:13,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993834421] [2021-11-21 01:00:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:13,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-21 01:00:13,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:13,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993834421] [2021-11-21 01:00:13,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993834421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:13,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974400219] [2021-11-21 01:00:13,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:00:13,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:13,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:14,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:00:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:14,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:00:14,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-21 01:00:14,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-21 01:00:14,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974400219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693330427] [2021-11-21 01:00:14,404 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 01:00:14,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:00:14,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-21 01:00:14,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220831799] [2021-11-21 01:00:14,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:14,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:00:14,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:00:14,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:00:14,407 INFO L87 Difference]: Start difference. First operand 778 states and 1552 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 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 01:00:14,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:14,581 INFO L93 Difference]: Finished difference Result 1681 states and 3358 transitions. [2021-11-21 01:00:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:00:14,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 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 63 [2021-11-21 01:00:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:14,595 INFO L225 Difference]: With dead ends: 1681 [2021-11-21 01:00:14,595 INFO L226 Difference]: Without dead ends: 1681 [2021-11-21 01:00:14,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:00:14,597 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 204 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:14,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 28 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:00:14,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2021-11-21 01:00:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1681. [2021-11-21 01:00:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1680 states have (on average 1.9988095238095238) internal successors, (3358), 1680 states have internal predecessors, (3358), 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 01:00:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 3358 transitions. [2021-11-21 01:00:14,664 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 3358 transitions. Word has length 63 [2021-11-21 01:00:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:14,664 INFO L470 AbstractCegarLoop]: Abstraction has 1681 states and 3358 transitions. [2021-11-21 01:00:14,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 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 01:00:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 3358 transitions. [2021-11-21 01:00:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-21 01:00:14,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:14,672 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:14,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:14,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:14,894 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:00:14,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:14,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1898644589, now seen corresponding path program 5 times [2021-11-21 01:00:14,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:14,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679990164] [2021-11-21 01:00:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:14,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-21 01:00:15,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:15,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679990164] [2021-11-21 01:00:15,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679990164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:15,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180968501] [2021-11-21 01:00:15,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:00:15,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:15,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:15,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:15,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:00:15,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-21 01:00:15,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:15,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:00:15,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-21 01:00:15,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-21 01:00:16,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180968501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [925320619] [2021-11-21 01:00:16,207 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 01:00:16,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:00:16,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2021-11-21 01:00:16,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108641775] [2021-11-21 01:00:16,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:16,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-21 01:00:16,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-21 01:00:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:00:16,212 INFO L87 Difference]: Start difference. First operand 1681 states and 3358 transitions. Second operand has 35 states, 35 states have (on average 3.942857142857143) internal successors, (138), 35 states have internal predecessors, (138), 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 01:00:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:28,312 INFO L93 Difference]: Finished difference Result 3656 states and 7308 transitions. [2021-11-21 01:00:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2021-11-21 01:00:28,312 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.942857142857143) internal successors, (138), 35 states have internal predecessors, (138), 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 84 [2021-11-21 01:00:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:28,334 INFO L225 Difference]: With dead ends: 3656 [2021-11-21 01:00:28,334 INFO L226 Difference]: Without dead ends: 3656 [2021-11-21 01:00:28,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34295 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=24255, Invalid=62475, Unknown=0, NotChecked=0, Total=86730 [2021-11-21 01:00:28,360 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3523 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3523 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1276 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:28,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3523 Valid, 106 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1276 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 01:00:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-11-21 01:00:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3490. [2021-11-21 01:00:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3490 states, 3489 states have (on average 1.999426769848094) internal successors, (6976), 3489 states have internal predecessors, (6976), 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 01:00:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 6976 transitions. [2021-11-21 01:00:28,479 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 6976 transitions. Word has length 84 [2021-11-21 01:00:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:28,480 INFO L470 AbstractCegarLoop]: Abstraction has 3490 states and 6976 transitions. [2021-11-21 01:00:28,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.942857142857143) internal successors, (138), 35 states have internal predecessors, (138), 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 01:00:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 6976 transitions. [2021-11-21 01:00:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 01:00:28,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:28,497 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:28,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:28,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:00:28,709 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:00:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:28,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1923136651, now seen corresponding path program 6 times [2021-11-21 01:00:28,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:28,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116775045] [2021-11-21 01:00:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:28,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-21 01:00:28,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:28,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116775045] [2021-11-21 01:00:28,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116775045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:28,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114076919] [2021-11-21 01:00:28,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:00:28,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:28,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:28,952 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:28,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:00:30,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:00:30,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:30,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:00:30,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-21 01:00:30,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-21 01:00:31,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114076919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870894953] [2021-11-21 01:00:31,002 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 01:00:31,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:00:31,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2021-11-21 01:00:31,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931308949] [2021-11-21 01:00:31,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:31,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:00:31,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:00:31,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:00:31,009 INFO L87 Difference]: Start difference. First operand 3490 states and 6976 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 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 01:00:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:31,243 INFO L93 Difference]: Finished difference Result 5233 states and 10462 transitions. [2021-11-21 01:00:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:00:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 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 127 [2021-11-21 01:00:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:31,278 INFO L225 Difference]: With dead ends: 5233 [2021-11-21 01:00:31,279 INFO L226 Difference]: Without dead ends: 5233 [2021-11-21 01:00:31,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:00:31,281 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 310 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:31,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 46 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:00:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2021-11-21 01:00:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 5233. [2021-11-21 01:00:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 1.9996177370030581) internal successors, (10462), 5232 states have internal predecessors, (10462), 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 01:00:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 10462 transitions. [2021-11-21 01:00:31,455 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 10462 transitions. Word has length 127 [2021-11-21 01:00:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:31,457 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 10462 transitions. [2021-11-21 01:00:31,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 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 01:00:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 10462 transitions. [2021-11-21 01:00:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:00:31,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:31,473 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:31,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:31,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:00:31,698 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:00:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:31,698 INFO L85 PathProgramCache]: Analyzing trace with hash -349852765, now seen corresponding path program 7 times [2021-11-21 01:00:31,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:31,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17739177] [2021-11-21 01:00:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:31,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:33,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17739177] [2021-11-21 01:00:33,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17739177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882846809] [2021-11-21 01:00:33,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:00:33,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:33,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:33,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:33,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:00:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:00:34,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:35,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:36,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882846809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819380564] [2021-11-21 01:00:36,043 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 01:00:36,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:00:36,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:00:36,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043000163] [2021-11-21 01:00:36,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:36,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:00:36,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:36,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:00:36,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:00:36,050 INFO L87 Difference]: Start difference. First operand 5233 states and 10462 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:01:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:24,048 INFO L93 Difference]: Finished difference Result 34492 states and 68977 transitions. [2021-11-21 01:01:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2021-11-21 01:01:24,049 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:01:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:24,234 INFO L225 Difference]: With dead ends: 34492 [2021-11-21 01:01:24,234 INFO L226 Difference]: Without dead ends: 34490 [2021-11-21 01:01:24,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26335 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1043, Invalid=84513, Unknown=0, NotChecked=0, Total=85556 [2021-11-21 01:01:24,244 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1418 mSDsluCounter, 76116 mSDsCounter, 0 mSdLazyCounter, 124888 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 125368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 124888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:24,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1418 Valid, 21 Invalid, 125368 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [480 Valid, 124888 Invalid, 0 Unknown, 0 Unchecked, 40.2s Time] [2021-11-21 01:01:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34490 states. [2021-11-21 01:01:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34490 to 5485. [2021-11-21 01:01:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5485 states, 5484 states have (on average 2.014040846097739) internal successors, (11045), 5484 states have internal predecessors, (11045), 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 01:01:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 11045 transitions. [2021-11-21 01:01:24,711 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 11045 transitions. Word has length 148 [2021-11-21 01:01:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:24,712 INFO L470 AbstractCegarLoop]: Abstraction has 5485 states and 11045 transitions. [2021-11-21 01:01:24,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:01:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 11045 transitions. [2021-11-21 01:01:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:01:24,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:24,728 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:24,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:24,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:24,942 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:01:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1676890417, now seen corresponding path program 8 times [2021-11-21 01:01:24,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:24,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972603850] [2021-11-21 01:01:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:24,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 1292 trivial. 0 not checked. [2021-11-21 01:01:25,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972603850] [2021-11-21 01:01:25,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972603850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:25,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:25,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:01:25,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705535628] [2021-11-21 01:01:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:25,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:01:25,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:01:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:01:25,019 INFO L87 Difference]: Start difference. First operand 5485 states and 11045 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 01:01:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:25,049 INFO L93 Difference]: Finished difference Result 2945 states and 3782 transitions. [2021-11-21 01:01:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:01:25,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 148 [2021-11-21 01:01:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:25,056 INFO L225 Difference]: With dead ends: 2945 [2021-11-21 01:01:25,057 INFO L226 Difference]: Without dead ends: 2945 [2021-11-21 01:01:25,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 01:01:25,058 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:25,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:01:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-11-21 01:01:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2924. [2021-11-21 01:01:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 1.2863496407800206) internal successors, (3760), 2923 states have internal predecessors, (3760), 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 01:01:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 3760 transitions. [2021-11-21 01:01:25,232 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 3760 transitions. Word has length 148 [2021-11-21 01:01:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:25,232 INFO L470 AbstractCegarLoop]: Abstraction has 2924 states and 3760 transitions. [2021-11-21 01:01:25,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 01:01:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 3760 transitions. [2021-11-21 01:01:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:01:25,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:25,241 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:25,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:01:25,241 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:01:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash -28162525, now seen corresponding path program 9 times [2021-11-21 01:01:25,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:25,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958680637] [2021-11-21 01:01:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:25,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:27,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:27,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958680637] [2021-11-21 01:01:27,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958680637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:27,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540604521] [2021-11-21 01:01:27,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:01:27,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:27,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:27,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:27,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:01:29,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:01:29,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:01:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:01:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:30,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:31,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540604521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:31,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [994454027] [2021-11-21 01:01:31,358 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 01:01:31,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:01:31,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:01:31,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308142616] [2021-11-21 01:01:31,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:01:31,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:01:31,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:31,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:01:31,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:01:31,362 INFO L87 Difference]: Start difference. First operand 2924 states and 3760 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:02:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:08,201 INFO L93 Difference]: Finished difference Result 14303 states and 20974 transitions. [2021-11-21 01:02:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-11-21 01:02:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:02:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:08,233 INFO L225 Difference]: With dead ends: 14303 [2021-11-21 01:02:08,233 INFO L226 Difference]: Without dead ends: 14301 [2021-11-21 01:02:08,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26565 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1047, Invalid=85095, Unknown=0, NotChecked=0, Total=86142 [2021-11-21 01:02:08,241 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1130 mSDsluCounter, 61545 mSDsCounter, 0 mSdLazyCounter, 96389 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 96640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 96389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:08,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 21 Invalid, 96640 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [251 Valid, 96389 Invalid, 0 Unknown, 0 Unchecked, 29.7s Time] [2021-11-21 01:02:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14301 states. [2021-11-21 01:02:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14301 to 2927. [2021-11-21 01:02:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 1.2863978127136022) internal successors, (3764), 2926 states have internal predecessors, (3764), 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 01:02:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 3764 transitions. [2021-11-21 01:02:08,393 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 3764 transitions. Word has length 148 [2021-11-21 01:02:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:08,394 INFO L470 AbstractCegarLoop]: Abstraction has 2927 states and 3764 transitions. [2021-11-21 01:02:08,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:02:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 3764 transitions. [2021-11-21 01:02:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:02:08,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:08,403 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:08,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:08,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:02:08,617 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:02:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1594875741, now seen corresponding path program 10 times [2021-11-21 01:02:08,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:08,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946456728] [2021-11-21 01:02:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:08,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:10,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:10,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946456728] [2021-11-21 01:02:10,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946456728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:10,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912325790] [2021-11-21 01:02:10,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:02:10,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:10,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:10,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:10,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:02:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:10,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:02:10,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:11,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:11,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912325790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:11,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1065659962] [2021-11-21 01:02:11,809 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 01:02:11,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:11,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:02:11,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195593317] [2021-11-21 01:02:11,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:11,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:02:11,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:02:11,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:02:11,812 INFO L87 Difference]: Start difference. First operand 2927 states and 3764 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:02:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:48,707 INFO L93 Difference]: Finished difference Result 14307 states and 20976 transitions. [2021-11-21 01:02:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2021-11-21 01:02:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:02:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:48,743 INFO L225 Difference]: With dead ends: 14307 [2021-11-21 01:02:48,743 INFO L226 Difference]: Without dead ends: 14305 [2021-11-21 01:02:48,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26796 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1051, Invalid=85679, Unknown=0, NotChecked=0, Total=86730 [2021-11-21 01:02:48,749 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1134 mSDsluCounter, 61781 mSDsCounter, 0 mSdLazyCounter, 96750 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 97002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 96750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:48,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 21 Invalid, 97002 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [252 Valid, 96750 Invalid, 0 Unknown, 0 Unchecked, 29.8s Time] [2021-11-21 01:02:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14305 states. [2021-11-21 01:02:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14305 to 2933. [2021-11-21 01:02:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2932 states have (on average 1.2861527967257844) internal successors, (3771), 2932 states have internal predecessors, (3771), 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 01:02:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 3771 transitions. [2021-11-21 01:02:48,910 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 3771 transitions. Word has length 148 [2021-11-21 01:02:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:48,910 INFO L470 AbstractCegarLoop]: Abstraction has 2933 states and 3771 transitions. [2021-11-21 01:02:48,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:02:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 3771 transitions. [2021-11-21 01:02:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:02:48,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:48,919 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:48,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:49,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:49,134 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:02:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:49,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1113638109, now seen corresponding path program 11 times [2021-11-21 01:02:49,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:49,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066686622] [2021-11-21 01:02:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:49,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:51,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:51,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066686622] [2021-11-21 01:02:51,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066686622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:51,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985609200] [2021-11-21 01:02:51,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:02:51,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:51,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:51,004 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:51,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:02:51,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-21 01:02:51,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:51,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:02:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:52,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:52,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985609200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:52,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118450827] [2021-11-21 01:02:52,915 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 01:02:52,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:52,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:02:52,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021295844] [2021-11-21 01:02:52,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:52,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:02:52,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:02:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:02:52,919 INFO L87 Difference]: Start difference. First operand 2933 states and 3771 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:03:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:30,004 INFO L93 Difference]: Finished difference Result 14313 states and 20983 transitions. [2021-11-21 01:03:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2021-11-21 01:03:30,004 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:03:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:30,037 INFO L225 Difference]: With dead ends: 14313 [2021-11-21 01:03:30,037 INFO L226 Difference]: Without dead ends: 14311 [2021-11-21 01:03:30,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27028 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1055, Invalid=86265, Unknown=0, NotChecked=0, Total=87320 [2021-11-21 01:03:30,042 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1138 mSDsluCounter, 62017 mSDsCounter, 0 mSdLazyCounter, 97111 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 97364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 97111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:30,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 21 Invalid, 97364 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [253 Valid, 97111 Invalid, 0 Unknown, 0 Unchecked, 30.0s Time] [2021-11-21 01:03:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14311 states. [2021-11-21 01:03:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14311 to 2939. [2021-11-21 01:03:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 1.2859087814840027) internal successors, (3778), 2938 states have internal predecessors, (3778), 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 01:03:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 3778 transitions. [2021-11-21 01:03:30,167 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 3778 transitions. Word has length 148 [2021-11-21 01:03:30,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:30,168 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 3778 transitions. [2021-11-21 01:03:30,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:03:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 3778 transitions. [2021-11-21 01:03:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:03:30,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:30,176 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:03:30,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:03:30,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:03:30,390 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:03:30,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:30,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1895852637, now seen corresponding path program 12 times [2021-11-21 01:03:30,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:30,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125671040] [2021-11-21 01:03:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:30,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:03:32,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:32,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125671040] [2021-11-21 01:03:32,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125671040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:03:32,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504175167] [2021-11-21 01:03:32,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:03:32,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:03:32,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:03:32,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:03:32,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:03:34,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:03:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:03:34,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:03:34,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:03:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:03:34,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:03:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:03:35,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504175167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:03:35,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586616208] [2021-11-21 01:03:35,562 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 01:03:35,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:03:35,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:03:35,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962388825] [2021-11-21 01:03:35,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:03:35,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:03:35,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:35,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:03:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:03:35,565 INFO L87 Difference]: Start difference. First operand 2939 states and 3778 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:04:12,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:12,679 INFO L93 Difference]: Finished difference Result 14325 states and 20999 transitions. [2021-11-21 01:04:12,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 297 states. [2021-11-21 01:04:12,680 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:04:12,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:12,706 INFO L225 Difference]: With dead ends: 14325 [2021-11-21 01:04:12,707 INFO L226 Difference]: Without dead ends: 14323 [2021-11-21 01:04:12,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27261 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1059, Invalid=86853, Unknown=0, NotChecked=0, Total=87912 [2021-11-21 01:04:12,712 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1142 mSDsluCounter, 62253 mSDsCounter, 0 mSdLazyCounter, 97472 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 97726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 97472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:12,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 21 Invalid, 97726 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [254 Valid, 97472 Invalid, 0 Unknown, 0 Unchecked, 30.0s Time] [2021-11-21 01:04:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14323 states. [2021-11-21 01:04:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14323 to 2945. [2021-11-21 01:04:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2944 states have (on average 1.2856657608695652) internal successors, (3785), 2944 states have internal predecessors, (3785), 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 01:04:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 3785 transitions. [2021-11-21 01:04:12,842 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 3785 transitions. Word has length 148 [2021-11-21 01:04:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:12,843 INFO L470 AbstractCegarLoop]: Abstraction has 2945 states and 3785 transitions. [2021-11-21 01:04:12,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:04:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 3785 transitions. [2021-11-21 01:04:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:04:12,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:12,852 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:12,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:13,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 01:04:13,078 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:04:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1615777757, now seen corresponding path program 13 times [2021-11-21 01:04:13,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:04:13,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709489196] [2021-11-21 01:04:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:13,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:04:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:14,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:04:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709489196] [2021-11-21 01:04:14,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709489196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:04:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035884682] [2021-11-21 01:04:14,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:04:14,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:14,869 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:14,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:04:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:14,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:04:14,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:15,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:16,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035884682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:16,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423559946] [2021-11-21 01:04:16,301 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 01:04:16,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:04:16,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:04:16,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006455698] [2021-11-21 01:04:16,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:16,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:04:16,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:04:16,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:04:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:04:16,303 INFO L87 Difference]: Start difference. First operand 2945 states and 3785 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:04:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:53,459 INFO L93 Difference]: Finished difference Result 14343 states and 21024 transitions. [2021-11-21 01:04:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 298 states. [2021-11-21 01:04:53,460 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:04:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:53,489 INFO L225 Difference]: With dead ends: 14343 [2021-11-21 01:04:53,489 INFO L226 Difference]: Without dead ends: 14341 [2021-11-21 01:04:53,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27495 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1063, Invalid=87443, Unknown=0, NotChecked=0, Total=88506 [2021-11-21 01:04:53,495 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1146 mSDsluCounter, 62489 mSDsCounter, 0 mSdLazyCounter, 97833 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 98088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 97833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:53,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 21 Invalid, 98088 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [255 Valid, 97833 Invalid, 0 Unknown, 0 Unchecked, 30.0s Time] [2021-11-21 01:04:53,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14341 states. [2021-11-21 01:04:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14341 to 2951. [2021-11-21 01:04:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 1.2854237288135593) internal successors, (3792), 2950 states have internal predecessors, (3792), 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 01:04:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 3792 transitions. [2021-11-21 01:04:53,698 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 3792 transitions. Word has length 148 [2021-11-21 01:04:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:53,699 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 3792 transitions. [2021-11-21 01:04:53,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:04:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 3792 transitions. [2021-11-21 01:04:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:04:53,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:53,708 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:53,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:53,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:04:53,922 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:04:53,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:53,922 INFO L85 PathProgramCache]: Analyzing trace with hash -900461917, now seen corresponding path program 14 times [2021-11-21 01:04:53,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:04:53,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580661185] [2021-11-21 01:04:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:53,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:04:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:55,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:04:55,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580661185] [2021-11-21 01:04:55,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580661185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:04:55,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791414820] [2021-11-21 01:04:55,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:04:55,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:55,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:55,846 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:55,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:04:56,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-21 01:04:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:04:56,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:04:56,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:57,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:57,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791414820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:57,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1134401313] [2021-11-21 01:04:57,701 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 01:04:57,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:04:57,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:04:57,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370881324] [2021-11-21 01:04:57,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:57,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:04:57,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:04:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:04:57,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:04:57,703 INFO L87 Difference]: Start difference. First operand 2951 states and 3792 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:05:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:35,027 INFO L93 Difference]: Finished difference Result 14367 states and 21058 transitions. [2021-11-21 01:05:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2021-11-21 01:05:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:05:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:35,081 INFO L225 Difference]: With dead ends: 14367 [2021-11-21 01:05:35,081 INFO L226 Difference]: Without dead ends: 14365 [2021-11-21 01:05:35,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27730 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1067, Invalid=88035, Unknown=0, NotChecked=0, Total=89102 [2021-11-21 01:05:35,085 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1150 mSDsluCounter, 62725 mSDsCounter, 0 mSdLazyCounter, 98194 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 98450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 98194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:35,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 21 Invalid, 98450 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [256 Valid, 98194 Invalid, 0 Unknown, 0 Unchecked, 30.2s Time] [2021-11-21 01:05:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14365 states. [2021-11-21 01:05:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14365 to 2957. [2021-11-21 01:05:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2956 states have (on average 1.2851826792963463) internal successors, (3799), 2956 states have internal predecessors, (3799), 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 01:05:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 3799 transitions. [2021-11-21 01:05:35,211 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 3799 transitions. Word has length 148 [2021-11-21 01:05:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:35,212 INFO L470 AbstractCegarLoop]: Abstraction has 2957 states and 3799 transitions. [2021-11-21 01:05:35,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:05:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 3799 transitions. [2021-11-21 01:05:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:05:35,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:35,221 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:35,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:35,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:05:35,446 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:05:35,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash 965223715, now seen corresponding path program 15 times [2021-11-21 01:05:35,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:35,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488413634] [2021-11-21 01:05:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:35,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:37,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:37,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488413634] [2021-11-21 01:05:37,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488413634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:37,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972674056] [2021-11-21 01:05:37,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:05:37,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:37,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:37,288 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:37,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 01:05:39,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:05:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:39,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:05:39,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:40,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:40,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972674056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:40,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1849153658] [2021-11-21 01:05:40,989 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 01:05:40,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:05:40,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:05:40,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809799556] [2021-11-21 01:05:40,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:40,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:05:40,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:40,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:05:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:05:40,993 INFO L87 Difference]: Start difference. First operand 2957 states and 3799 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:06:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:19,062 INFO L93 Difference]: Finished difference Result 14397 states and 21101 transitions. [2021-11-21 01:06:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2021-11-21 01:06:19,062 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:06:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:19,079 INFO L225 Difference]: With dead ends: 14397 [2021-11-21 01:06:19,079 INFO L226 Difference]: Without dead ends: 14395 [2021-11-21 01:06:19,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27966 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1071, Invalid=88629, Unknown=0, NotChecked=0, Total=89700 [2021-11-21 01:06:19,084 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1154 mSDsluCounter, 62961 mSDsCounter, 0 mSdLazyCounter, 98555 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 98812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 98555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:19,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 21 Invalid, 98812 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [257 Valid, 98555 Invalid, 0 Unknown, 0 Unchecked, 30.7s Time] [2021-11-21 01:06:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14395 states. [2021-11-21 01:06:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14395 to 2963. [2021-11-21 01:06:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 1.2849426063470628) internal successors, (3806), 2962 states have internal predecessors, (3806), 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 01:06:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 3806 transitions. [2021-11-21 01:06:19,255 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 3806 transitions. Word has length 148 [2021-11-21 01:06:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:19,256 INFO L470 AbstractCegarLoop]: Abstraction has 2963 states and 3806 transitions. [2021-11-21 01:06:19,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:06:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 3806 transitions. [2021-11-21 01:06:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:06:19,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:19,264 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:06:19,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-21 01:06:19,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:06:19,475 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:06:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:19,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1743617955, now seen corresponding path program 16 times [2021-11-21 01:06:19,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:06:19,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490667688] [2021-11-21 01:06:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:19,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:06:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:06:21,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:06:21,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490667688] [2021-11-21 01:06:21,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490667688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:21,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039678955] [2021-11-21 01:06:21,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:06:21,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:21,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:21,607 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:21,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:06:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:21,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:06:21,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:06:22,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:06:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039678955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317740829] [2021-11-21 01:06:23,045 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 01:06:23,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:06:23,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:06:23,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171543090] [2021-11-21 01:06:23,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:23,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:06:23,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:06:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:06:23,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:06:23,048 INFO L87 Difference]: Start difference. First operand 2963 states and 3806 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:07:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:00,827 INFO L93 Difference]: Finished difference Result 14433 states and 21153 transitions. [2021-11-21 01:07:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2021-11-21 01:07:00,827 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:07:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:00,843 INFO L225 Difference]: With dead ends: 14433 [2021-11-21 01:07:00,843 INFO L226 Difference]: Without dead ends: 14431 [2021-11-21 01:07:00,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28203 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1075, Invalid=89225, Unknown=0, NotChecked=0, Total=90300 [2021-11-21 01:07:00,846 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1158 mSDsluCounter, 63197 mSDsCounter, 0 mSdLazyCounter, 98916 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 99174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 98916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:00,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 21 Invalid, 99174 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [258 Valid, 98916 Invalid, 0 Unknown, 0 Unchecked, 30.5s Time] [2021-11-21 01:07:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14431 states. [2021-11-21 01:07:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14431 to 2969. [2021-11-21 01:07:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2968 states have (on average 1.2847035040431267) internal successors, (3813), 2968 states have internal predecessors, (3813), 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 01:07:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 3813 transitions. [2021-11-21 01:07:00,959 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 3813 transitions. Word has length 148 [2021-11-21 01:07:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:00,960 INFO L470 AbstractCegarLoop]: Abstraction has 2969 states and 3813 transitions. [2021-11-21 01:07:00,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:07:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 3813 transitions. [2021-11-21 01:07:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:07:00,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:00,967 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:01,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:07:01,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:07:01,194 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:07:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash 539236899, now seen corresponding path program 17 times [2021-11-21 01:07:01,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:01,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937920626] [2021-11-21 01:07:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:01,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:03,095 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:03,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937920626] [2021-11-21 01:07:03,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937920626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:07:03,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962930736] [2021-11-21 01:07:03,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:07:03,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:03,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:07:03,097 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:07:03,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 01:07:03,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-21 01:07:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:07:03,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:07:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:07:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:04,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:04,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962930736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:07:04,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1704789150] [2021-11-21 01:07:04,793 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 01:07:04,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:07:04,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:07:04,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324467486] [2021-11-21 01:07:04,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:07:04,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:07:04,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:07:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:07:04,797 INFO L87 Difference]: Start difference. First operand 2969 states and 3813 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:07:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:42,676 INFO L93 Difference]: Finished difference Result 14475 states and 21214 transitions. [2021-11-21 01:07:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 302 states. [2021-11-21 01:07:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:07:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:42,700 INFO L225 Difference]: With dead ends: 14475 [2021-11-21 01:07:42,700 INFO L226 Difference]: Without dead ends: 14473 [2021-11-21 01:07:42,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28441 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1079, Invalid=89823, Unknown=0, NotChecked=0, Total=90902 [2021-11-21 01:07:42,706 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1162 mSDsluCounter, 63433 mSDsCounter, 0 mSdLazyCounter, 99277 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 99536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 99277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:42,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1162 Valid, 21 Invalid, 99536 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [259 Valid, 99277 Invalid, 0 Unknown, 0 Unchecked, 30.6s Time] [2021-11-21 01:07:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-11-21 01:07:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 2975. [2021-11-21 01:07:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 1.2844653665097512) internal successors, (3820), 2974 states have internal predecessors, (3820), 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 01:07:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 3820 transitions. [2021-11-21 01:07:42,821 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 3820 transitions. Word has length 148 [2021-11-21 01:07:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:42,821 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 3820 transitions. [2021-11-21 01:07:42,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:07:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 3820 transitions. [2021-11-21 01:07:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:07:42,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:42,827 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:42,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:07:43,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:43,042 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:07:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:43,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2093741219, now seen corresponding path program 18 times [2021-11-21 01:07:43,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:43,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751976245] [2021-11-21 01:07:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:43,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:44,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751976245] [2021-11-21 01:07:44,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751976245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:07:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553547671] [2021-11-21 01:07:44,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:07:44,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:44,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:07:44,918 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:07:44,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 01:07:47,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:07:47,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:07:47,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:07:47,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:07:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:47,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:48,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553547671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:07:48,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1884277723] [2021-11-21 01:07:48,467 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 01:07:48,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:07:48,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:07:48,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627545855] [2021-11-21 01:07:48,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:07:48,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:07:48,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:07:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:07:48,470 INFO L87 Difference]: Start difference. First operand 2975 states and 3820 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:08:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:26,338 INFO L93 Difference]: Finished difference Result 14523 states and 21284 transitions. [2021-11-21 01:08:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 303 states. [2021-11-21 01:08:26,339 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:08:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:26,356 INFO L225 Difference]: With dead ends: 14523 [2021-11-21 01:08:26,356 INFO L226 Difference]: Without dead ends: 14521 [2021-11-21 01:08:26,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28680 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1083, Invalid=90423, Unknown=0, NotChecked=0, Total=91506 [2021-11-21 01:08:26,359 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1166 mSDsluCounter, 63669 mSDsCounter, 0 mSdLazyCounter, 99638 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 99898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 99638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:26,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1166 Valid, 21 Invalid, 99898 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [260 Valid, 99638 Invalid, 0 Unknown, 0 Unchecked, 30.6s Time] [2021-11-21 01:08:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14521 states. [2021-11-21 01:08:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14521 to 2981. [2021-11-21 01:08:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 1.284228187919463) internal successors, (3827), 2980 states have internal predecessors, (3827), 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 01:08:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 3827 transitions. [2021-11-21 01:08:26,470 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 3827 transitions. Word has length 148 [2021-11-21 01:08:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:26,470 INFO L470 AbstractCegarLoop]: Abstraction has 2981 states and 3827 transitions. [2021-11-21 01:08:26,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:08:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 3827 transitions. [2021-11-21 01:08:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:08:26,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:26,479 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:26,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:08:26,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:08:26,706 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:08:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:26,706 INFO L85 PathProgramCache]: Analyzing trace with hash -393933021, now seen corresponding path program 19 times [2021-11-21 01:08:26,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:26,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836736749] [2021-11-21 01:08:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:26,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:28,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:28,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836736749] [2021-11-21 01:08:28,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836736749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:08:28,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419736693] [2021-11-21 01:08:28,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:08:28,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:08:28,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:08:28,438 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:08:28,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 01:08:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:28,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:08:28,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:08:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:29,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:08:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:29,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419736693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:08:29,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019447376] [2021-11-21 01:08:29,916 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 01:08:29,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:08:29,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:08:29,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421889070] [2021-11-21 01:08:29,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:08:29,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:08:29,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:08:29,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:08:29,919 INFO L87 Difference]: Start difference. First operand 2981 states and 3827 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:09:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:07,983 INFO L93 Difference]: Finished difference Result 14577 states and 21363 transitions. [2021-11-21 01:09:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 304 states. [2021-11-21 01:09:07,984 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:09:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:08,000 INFO L225 Difference]: With dead ends: 14577 [2021-11-21 01:09:08,001 INFO L226 Difference]: Without dead ends: 14575 [2021-11-21 01:09:08,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28920 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1087, Invalid=91025, Unknown=0, NotChecked=0, Total=92112 [2021-11-21 01:09:08,004 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1170 mSDsluCounter, 63905 mSDsCounter, 0 mSdLazyCounter, 99999 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 100260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 99999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:08,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1170 Valid, 21 Invalid, 100260 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [261 Valid, 99999 Invalid, 0 Unknown, 0 Unchecked, 30.7s Time] [2021-11-21 01:09:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14575 states. [2021-11-21 01:09:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14575 to 2987. [2021-11-21 01:09:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2986 states have (on average 1.2839919624916276) internal successors, (3834), 2986 states have internal predecessors, (3834), 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 01:09:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 3834 transitions. [2021-11-21 01:09:08,170 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 3834 transitions. Word has length 148 [2021-11-21 01:09:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:08,172 INFO L470 AbstractCegarLoop]: Abstraction has 2987 states and 3834 transitions. [2021-11-21 01:09:08,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:09:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 3834 transitions. [2021-11-21 01:09:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:09:08,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:08,176 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:08,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:09:08,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:09:08,377 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:09:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash 502229411, now seen corresponding path program 20 times [2021-11-21 01:09:08,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:08,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124108466] [2021-11-21 01:09:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:08,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:10,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:10,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124108466] [2021-11-21 01:09:10,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124108466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:09:10,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756647038] [2021-11-21 01:09:10,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:09:10,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:09:10,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:09:10,303 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:09:10,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 01:09:10,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-21 01:09:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:09:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:09:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:09:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:11,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:09:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:12,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756647038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:09:12,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240707133] [2021-11-21 01:09:12,073 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 01:09:12,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:09:12,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:09:12,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427897592] [2021-11-21 01:09:12,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:09:12,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:09:12,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:12,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:09:12,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:09:12,077 INFO L87 Difference]: Start difference. First operand 2987 states and 3834 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:09:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:50,131 INFO L93 Difference]: Finished difference Result 14637 states and 21451 transitions. [2021-11-21 01:09:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2021-11-21 01:09:50,132 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:09:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:50,147 INFO L225 Difference]: With dead ends: 14637 [2021-11-21 01:09:50,147 INFO L226 Difference]: Without dead ends: 14635 [2021-11-21 01:09:50,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29161 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1091, Invalid=91629, Unknown=0, NotChecked=0, Total=92720 [2021-11-21 01:09:50,152 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1174 mSDsluCounter, 64141 mSDsCounter, 0 mSdLazyCounter, 100360 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 100622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 100360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:50,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 21 Invalid, 100622 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [262 Valid, 100360 Invalid, 0 Unknown, 0 Unchecked, 30.7s Time] [2021-11-21 01:09:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14635 states. [2021-11-21 01:09:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14635 to 2993. [2021-11-21 01:09:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 1.2837566844919786) internal successors, (3841), 2992 states have internal predecessors, (3841), 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 01:09:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 3841 transitions. [2021-11-21 01:09:50,250 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 3841 transitions. Word has length 148 [2021-11-21 01:09:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:50,251 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 3841 transitions. [2021-11-21 01:09:50,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:09:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 3841 transitions. [2021-11-21 01:09:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:09:50,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:50,258 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:50,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:09:50,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-21 01:09:50,474 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:09:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash 665519139, now seen corresponding path program 21 times [2021-11-21 01:09:50,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:50,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103938225] [2021-11-21 01:09:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:50,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:52,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:52,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103938225] [2021-11-21 01:09:52,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103938225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:09:52,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000687290] [2021-11-21 01:09:52,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:09:52,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:09:52,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:09:52,342 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:09:52,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 01:09:54,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:09:54,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:09:54,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:09:54,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:09:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:55,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:09:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:55,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000687290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:09:55,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148597198] [2021-11-21 01:09:55,990 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 01:09:55,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:09:55,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:09:55,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793225934] [2021-11-21 01:09:55,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:09:55,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:09:55,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:09:55,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:09:55,993 INFO L87 Difference]: Start difference. First operand 2993 states and 3841 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:10:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:34,280 INFO L93 Difference]: Finished difference Result 14703 states and 21548 transitions. [2021-11-21 01:10:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2021-11-21 01:10:34,281 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 148 [2021-11-21 01:10:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:34,297 INFO L225 Difference]: With dead ends: 14703 [2021-11-21 01:10:34,297 INFO L226 Difference]: Without dead ends: 14701 [2021-11-21 01:10:34,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29403 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1095, Invalid=92235, Unknown=0, NotChecked=0, Total=93330 [2021-11-21 01:10:34,301 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1178 mSDsluCounter, 64377 mSDsCounter, 0 mSdLazyCounter, 100721 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 100984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 100721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:34,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 21 Invalid, 100984 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [263 Valid, 100721 Invalid, 0 Unknown, 0 Unchecked, 30.9s Time] [2021-11-21 01:10:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14701 states. [2021-11-21 01:10:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14701 to 2999. [2021-11-21 01:10:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 1.2835223482321547) internal successors, (3848), 2998 states have internal predecessors, (3848), 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 01:10:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 3848 transitions. [2021-11-21 01:10:34,397 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 3848 transitions. Word has length 148 [2021-11-21 01:10:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:34,398 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 3848 transitions. [2021-11-21 01:10:34,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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 01:10:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 3848 transitions. [2021-11-21 01:10:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:10:34,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:34,402 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:34,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:10:34,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:10:34,603 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-21 01:10:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:34,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1616371363, now seen corresponding path program 22 times [2021-11-21 01:10:34,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:34,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888172909] [2021-11-21 01:10:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:34,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:36,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:36,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888172909] [2021-11-21 01:10:36,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888172909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:10:36,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372521228] [2021-11-21 01:10:36,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:10:36,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:10:36,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:10:36,406 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:10:36,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc184045-00ec-4775-8643-7a6bb996c0b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 01:10:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:36,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-21 01:10:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:10:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:37,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:10:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:37,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372521228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:10:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724858744] [2021-11-21 01:10:37,842 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 01:10:37,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:10:37,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2021-11-21 01:10:37,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367827780] [2021-11-21 01:10:37,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:10:37,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:10:37,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:10:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:10:37,848 INFO L87 Difference]: Start difference. First operand 2999 states and 3848 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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)