./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF --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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:08:00,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:08:00,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:08:00,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:08:00,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:08:00,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:08:00,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:08:00,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:08:00,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:08:00,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:08:00,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:08:00,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:08:00,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:08:00,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:08:00,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:08:00,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:08:00,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:08:00,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:08:00,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:08:00,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:08:00,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:08:00,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:08:00,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:08:00,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:08:00,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:08:00,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:08:00,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:08:00,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:08:00,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:08:00,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:08:00,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:08:00,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:08:00,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:08:00,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:08:00,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:08:00,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:08:00,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:08:00,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:08:00,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:08:00,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:08:00,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:08:00,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:08:00,351 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:08:00,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:08:00,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:08:00,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:08:00,353 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:08:00,353 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:08:00,353 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:08:00,354 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:08:00,354 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:08:00,354 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:08:00,355 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:08:00,355 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:08:00,356 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:08:00,356 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:08:00,356 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:08:00,356 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:08:00,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:08:00,357 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:08:00,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:08:00,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:08:00,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:08:00,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:08:00,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:08:00,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:08:00,359 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:08:00,359 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:08:00,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:08:00,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:08:00,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:08:00,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:08:00,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:08:00,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:00,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:08:00,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:08:00,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:08:00,363 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:08:00,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:08:00,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:08:00,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:08:00,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:08:00,364 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_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2021-11-12 23:08:00,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:08:00,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:08:00,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:08:00,655 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:08:00,656 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:08:00,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-11-12 23:08:00,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/data/4003b24cb/fafd94a0e3a44f38aa5977b2442d7c54/FLAGdbb00034f [2021-11-12 23:08:01,176 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:08:01,177 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-11-12 23:08:01,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/data/4003b24cb/fafd94a0e3a44f38aa5977b2442d7c54/FLAGdbb00034f [2021-11-12 23:08:01,199 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/data/4003b24cb/fafd94a0e3a44f38aa5977b2442d7c54 [2021-11-12 23:08:01,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:08:01,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:08:01,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:01,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:08:01,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:08:01,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e53692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01, skipping insertion in model container [2021-11-12 23:08:01,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:08:01,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:01,434 WARN L228 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_62a6e560-7ed2-4a0e-a915-4fdd6285195e/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2021-11-12 23:08:01,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:01,446 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:08:01,464 WARN L228 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_62a6e560-7ed2-4a0e-a915-4fdd6285195e/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2021-11-12 23:08:01,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:01,479 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:08:01,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01 WrapperNode [2021-11-12 23:08:01,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:01,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:01,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:08:01,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:08:01,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:01,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:08:01,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:08:01,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:08:01,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:08:01,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:08:01,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:08:01,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:08:01,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:01,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:08:01,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:08:01,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-12 23:08:01,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-12 23:08:01,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-12 23:08:01,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-12 23:08:01,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:08:01,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:08:01,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-12 23:08:01,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-12 23:08:01,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-12 23:08:01,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:08:01,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:08:01,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-12 23:08:01,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:08:01,624 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-12 23:08:01,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:08:01,866 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:08:01,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:08:01 BoogieIcfgContainer [2021-11-12 23:08:01,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:08:01,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:08:01,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:08:01,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:08:01,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:08:01" (1/3) ... [2021-11-12 23:08:01,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd6e4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:08:01, skipping insertion in model container [2021-11-12 23:08:01,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (2/3) ... [2021-11-12 23:08:01,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd6e4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:08:01, skipping insertion in model container [2021-11-12 23:08:01,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:08:01" (3/3) ... [2021-11-12 23:08:01,876 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2021-11-12 23:08:01,881 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-12 23:08:01,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:08:01,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:08:01,882 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-12 23:08:01,911 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,911 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,912 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,912 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,912 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,912 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,913 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,913 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,913 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,913 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,914 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,914 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,914 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,914 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,916 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,916 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,917 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,917 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,918 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,918 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,918 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,918 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,919 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,919 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,919 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,919 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,920 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,920 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,922 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,922 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,922 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,922 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,926 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,929 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:08:01,933 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-12 23:08:02,012 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:08:02,019 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 [2021-11-12 23:08:02,019 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-12 23:08:02,039 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-12 23:08:02,068 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 87 transitions, 190 flow [2021-11-12 23:08:02,076 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 87 transitions, 190 flow [2021-11-12 23:08:02,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2021-11-12 23:08:02,133 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2021-11-12 23:08:02,133 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-12 23:08:02,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2021-11-12 23:08:02,140 INFO L116 LiptonReduction]: Number of co-enabled transitions 572 [2021-11-12 23:08:05,503 INFO L131 LiptonReduction]: Checked pairs total: 569 [2021-11-12 23:08:05,504 INFO L133 LiptonReduction]: Total number of compositions: 80 [2021-11-12 23:08:05,514 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-11-12 23:08:05,526 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 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) [2021-11-12 23:08:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 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) [2021-11-12 23:08:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:08:05,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:05,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:05,535 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash -262329212, now seen corresponding path program 1 times [2021-11-12 23:08:05,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:05,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920604723] [2021-11-12 23:08:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:05,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:05,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:05,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920604723] [2021-11-12 23:08:05,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920604723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:05,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:05,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:05,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522951916] [2021-11-12 23:08:05,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:05,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:05,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:05,945 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 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 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:06,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:06,109 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2021-11-12 23:08:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:06,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-11-12 23:08:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:06,120 INFO L225 Difference]: With dead ends: 43 [2021-11-12 23:08:06,121 INFO L226 Difference]: Without dead ends: 38 [2021-11-12 23:08:06,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:06,125 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.34ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:06,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 167 Unknown, 0 Unchecked, 4.34ms Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 116.81ms Time] [2021-11-12 23:08:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-12 23:08:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-12 23:08:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 37 states have internal predecessors, (80), 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) [2021-11-12 23:08:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 80 transitions. [2021-11-12 23:08:06,161 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 80 transitions. Word has length 13 [2021-11-12 23:08:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:06,161 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 80 transitions. [2021-11-12 23:08:06,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 80 transitions. [2021-11-12 23:08:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:08:06,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:06,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:06,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:08:06,163 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2059402752, now seen corresponding path program 2 times [2021-11-12 23:08:06,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:06,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897417436] [2021-11-12 23:08:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:06,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:06,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:06,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897417436] [2021-11-12 23:08:06,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897417436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:06,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:06,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:06,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361915923] [2021-11-12 23:08:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:06,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:06,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:06,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:06,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:06,295 INFO L87 Difference]: Start difference. First operand 38 states and 80 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:06,431 INFO L93 Difference]: Finished difference Result 49 states and 104 transitions. [2021-11-12 23:08:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:06,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-11-12 23:08:06,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:06,435 INFO L225 Difference]: With dead ends: 49 [2021-11-12 23:08:06,435 INFO L226 Difference]: Without dead ends: 44 [2021-11-12 23:08:06,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:06,438 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:06,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 169 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 105.58ms Time] [2021-11-12 23:08:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-12 23:08:06,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-11-12 23:08:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 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) [2021-11-12 23:08:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 89 transitions. [2021-11-12 23:08:06,454 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 89 transitions. Word has length 13 [2021-11-12 23:08:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:06,455 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 89 transitions. [2021-11-12 23:08:06,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 89 transitions. [2021-11-12 23:08:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:08:06,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:06,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:06,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:08:06,460 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2100744972, now seen corresponding path program 3 times [2021-11-12 23:08:06,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:06,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922196595] [2021-11-12 23:08:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:06,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:06,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:06,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922196595] [2021-11-12 23:08:06,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922196595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:06,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:06,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:06,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213977070] [2021-11-12 23:08:06,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:06,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:06,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:06,616 INFO L87 Difference]: Start difference. First operand 40 states and 89 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:06,756 INFO L93 Difference]: Finished difference Result 47 states and 98 transitions. [2021-11-12 23:08:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:06,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-11-12 23:08:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:06,761 INFO L225 Difference]: With dead ends: 47 [2021-11-12 23:08:06,761 INFO L226 Difference]: Without dead ends: 42 [2021-11-12 23:08:06,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:06,765 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:06,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 158 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [3 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 112.30ms Time] [2021-11-12 23:08:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-12 23:08:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-12 23:08:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 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) [2021-11-12 23:08:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 92 transitions. [2021-11-12 23:08:06,786 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 92 transitions. Word has length 13 [2021-11-12 23:08:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:06,786 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 92 transitions. [2021-11-12 23:08:06,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 92 transitions. [2021-11-12 23:08:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:08:06,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:06,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:06,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:08:06,788 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:06,789 INFO L85 PathProgramCache]: Analyzing trace with hash 913994926, now seen corresponding path program 4 times [2021-11-12 23:08:06,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:06,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311105801] [2021-11-12 23:08:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:06,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:06,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:06,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311105801] [2021-11-12 23:08:06,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311105801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:06,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:06,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:06,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62634510] [2021-11-12 23:08:06,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:06,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:06,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:06,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:06,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:06,931 INFO L87 Difference]: Start difference. First operand 42 states and 92 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:07,046 INFO L93 Difference]: Finished difference Result 53 states and 116 transitions. [2021-11-12 23:08:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-11-12 23:08:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:07,047 INFO L225 Difference]: With dead ends: 53 [2021-11-12 23:08:07,048 INFO L226 Difference]: Without dead ends: 48 [2021-11-12 23:08:07,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:07,049 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.84ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:07,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 170 Unknown, 0 Unchecked, 0.84ms Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 93.04ms Time] [2021-11-12 23:08:07,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-12 23:08:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-12 23:08:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 43 states have internal predecessors, (101), 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) [2021-11-12 23:08:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 101 transitions. [2021-11-12 23:08:07,056 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 101 transitions. Word has length 13 [2021-11-12 23:08:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:07,056 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 101 transitions. [2021-11-12 23:08:07,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 101 transitions. [2021-11-12 23:08:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:08:07,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:07,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:07,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:08:07,058 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash 872652706, now seen corresponding path program 5 times [2021-11-12 23:08:07,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:07,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793503630] [2021-11-12 23:08:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:07,200 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:07,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793503630] [2021-11-12 23:08:07,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793503630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:07,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:07,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:07,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315294521] [2021-11-12 23:08:07,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:07,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:07,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:07,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:07,203 INFO L87 Difference]: Start difference. First operand 44 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:07,312 INFO L93 Difference]: Finished difference Result 51 states and 110 transitions. [2021-11-12 23:08:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:07,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-11-12 23:08:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:07,314 INFO L225 Difference]: With dead ends: 51 [2021-11-12 23:08:07,314 INFO L226 Difference]: Without dead ends: 46 [2021-11-12 23:08:07,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:07,315 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:07,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 160 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 86.57ms Time] [2021-11-12 23:08:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-12 23:08:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-11-12 23:08:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 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) [2021-11-12 23:08:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 92 transitions. [2021-11-12 23:08:07,321 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 92 transitions. Word has length 13 [2021-11-12 23:08:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:07,321 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 92 transitions. [2021-11-12 23:08:07,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 92 transitions. [2021-11-12 23:08:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:08:07,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:07,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:07,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:08:07,323 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash -849258876, now seen corresponding path program 6 times [2021-11-12 23:08:07,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:07,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434671795] [2021-11-12 23:08:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:07,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:07,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434671795] [2021-11-12 23:08:07,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434671795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:07,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:07,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:07,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634073913] [2021-11-12 23:08:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:07,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:07,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:07,406 INFO L87 Difference]: Start difference. First operand 42 states and 92 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:07,515 INFO L93 Difference]: Finished difference Result 49 states and 101 transitions. [2021-11-12 23:08:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-11-12 23:08:07,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:07,516 INFO L225 Difference]: With dead ends: 49 [2021-11-12 23:08:07,516 INFO L226 Difference]: Without dead ends: 44 [2021-11-12 23:08:07,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:07,517 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:07,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 150 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 89.69ms Time] [2021-11-12 23:08:07,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-12 23:08:07,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-11-12 23:08:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 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) [2021-11-12 23:08:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 92 transitions. [2021-11-12 23:08:07,521 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 92 transitions. Word has length 13 [2021-11-12 23:08:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:07,521 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 92 transitions. [2021-11-12 23:08:07,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 23:08:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 92 transitions. [2021-11-12 23:08:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:07,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:07,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:07,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:08:07,522 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash 458276627, now seen corresponding path program 1 times [2021-11-12 23:08:07,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:07,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196580888] [2021-11-12 23:08:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:07,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:07,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196580888] [2021-11-12 23:08:07,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196580888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:07,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:07,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:07,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981199847] [2021-11-12 23:08:07,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:07,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:07,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:07,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:07,560 INFO L87 Difference]: Start difference. First operand 42 states and 92 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:07,643 INFO L93 Difference]: Finished difference Result 78 states and 166 transitions. [2021-11-12 23:08:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:07,644 INFO L225 Difference]: With dead ends: 78 [2021-11-12 23:08:07,644 INFO L226 Difference]: Without dead ends: 68 [2021-11-12 23:08:07,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:07,646 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.52ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:07,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.52ms Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 61.41ms Time] [2021-11-12 23:08:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-12 23:08:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2021-11-12 23:08:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 45 states have internal predecessors, (101), 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) [2021-11-12 23:08:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 101 transitions. [2021-11-12 23:08:07,652 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 101 transitions. Word has length 14 [2021-11-12 23:08:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:07,652 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 101 transitions. [2021-11-12 23:08:07,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 101 transitions. [2021-11-12 23:08:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:07,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:07,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:07,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:08:07,654 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash 583571735, now seen corresponding path program 2 times [2021-11-12 23:08:07,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:07,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114546899] [2021-11-12 23:08:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:07,693 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:07,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114546899] [2021-11-12 23:08:07,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114546899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:07,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:07,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:07,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827589514] [2021-11-12 23:08:07,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:07,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:07,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:07,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:07,696 INFO L87 Difference]: Start difference. First operand 46 states and 101 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:07,848 INFO L93 Difference]: Finished difference Result 98 states and 201 transitions. [2021-11-12 23:08:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:07,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:07,851 INFO L225 Difference]: With dead ends: 98 [2021-11-12 23:08:07,851 INFO L226 Difference]: Without dead ends: 94 [2021-11-12 23:08:07,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:07,852 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:07,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 129 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 115.69ms Time] [2021-11-12 23:08:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-12 23:08:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-11-12 23:08:07,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.339622641509434) internal successors, (124), 53 states have internal predecessors, (124), 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) [2021-11-12 23:08:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 124 transitions. [2021-11-12 23:08:07,860 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 124 transitions. Word has length 14 [2021-11-12 23:08:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:07,861 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 124 transitions. [2021-11-12 23:08:07,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 124 transitions. [2021-11-12 23:08:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:07,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:07,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:07,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:08:07,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1821416402, now seen corresponding path program 1 times [2021-11-12 23:08:07,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:07,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223569687] [2021-11-12 23:08:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:07,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:07,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223569687] [2021-11-12 23:08:07,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223569687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:07,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999383129] [2021-11-12 23:08:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:07,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:07,901 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:07,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:08:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:08:07,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:08,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:08,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999383129] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:08,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:08:08,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-11-12 23:08:08,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042652250] [2021-11-12 23:08:08,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:08,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:08,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:08,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:08,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:08,194 INFO L87 Difference]: Start difference. First operand 54 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:08,284 INFO L93 Difference]: Finished difference Result 86 states and 183 transitions. [2021-11-12 23:08:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:08,286 INFO L225 Difference]: With dead ends: 86 [2021-11-12 23:08:08,286 INFO L226 Difference]: Without dead ends: 86 [2021-11-12 23:08:08,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:08,288 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.54ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:08,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.54ms Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 61.08ms Time] [2021-11-12 23:08:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-12 23:08:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-11-12 23:08:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.456140350877193) internal successors, (140), 57 states have internal predecessors, (140), 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) [2021-11-12 23:08:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 140 transitions. [2021-11-12 23:08:08,296 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 140 transitions. Word has length 14 [2021-11-12 23:08:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:08,297 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 140 transitions. [2021-11-12 23:08:08,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 140 transitions. [2021-11-12 23:08:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:08,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:08,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:08,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:08,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-12 23:08:08,518 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:08,519 INFO L85 PathProgramCache]: Analyzing trace with hash -797144054, now seen corresponding path program 2 times [2021-11-12 23:08:08,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:08,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679636039] [2021-11-12 23:08:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:08,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:08,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:08,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679636039] [2021-11-12 23:08:08,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679636039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:08,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:08,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:08,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084783338] [2021-11-12 23:08:08,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:08,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:08,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:08,560 INFO L87 Difference]: Start difference. First operand 58 states and 140 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:08,659 INFO L93 Difference]: Finished difference Result 74 states and 164 transitions. [2021-11-12 23:08:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:08,661 INFO L225 Difference]: With dead ends: 74 [2021-11-12 23:08:08,661 INFO L226 Difference]: Without dead ends: 72 [2021-11-12 23:08:08,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:08,662 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:08,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 72.52ms Time] [2021-11-12 23:08:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-12 23:08:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-11-12 23:08:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 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) [2021-11-12 23:08:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 129 transitions. [2021-11-12 23:08:08,670 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 129 transitions. Word has length 14 [2021-11-12 23:08:08,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:08,670 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 129 transitions. [2021-11-12 23:08:08,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:08,670 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 129 transitions. [2021-11-12 23:08:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:08,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:08,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:08,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:08:08,672 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1504117157, now seen corresponding path program 3 times [2021-11-12 23:08:08,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:08,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679362117] [2021-11-12 23:08:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:08,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:08,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:08,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679362117] [2021-11-12 23:08:08,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679362117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:08,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:08,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:08,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059472283] [2021-11-12 23:08:08,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:08,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:08,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:08,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:08,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:08,714 INFO L87 Difference]: Start difference. First operand 56 states and 129 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:08,806 INFO L93 Difference]: Finished difference Result 72 states and 160 transitions. [2021-11-12 23:08:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:08,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:08,808 INFO L225 Difference]: With dead ends: 72 [2021-11-12 23:08:08,808 INFO L226 Difference]: Without dead ends: 72 [2021-11-12 23:08:08,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:08,809 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:08,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 73.66ms Time] [2021-11-12 23:08:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-12 23:08:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2021-11-12 23:08:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.3529411764705883) internal successors, (120), 51 states have internal predecessors, (120), 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) [2021-11-12 23:08:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 120 transitions. [2021-11-12 23:08:08,816 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 120 transitions. Word has length 14 [2021-11-12 23:08:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:08,816 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 120 transitions. [2021-11-12 23:08:08,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 120 transitions. [2021-11-12 23:08:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:08,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:08,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:08,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:08:08,818 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1730380759, now seen corresponding path program 4 times [2021-11-12 23:08:08,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:08,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619241606] [2021-11-12 23:08:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:08,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:08,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:08,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619241606] [2021-11-12 23:08:08,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619241606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:08,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:08,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:08,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773983299] [2021-11-12 23:08:08,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:08,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:08,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:08,870 INFO L87 Difference]: Start difference. First operand 52 states and 120 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:08,963 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2021-11-12 23:08:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:08,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:08,965 INFO L225 Difference]: With dead ends: 72 [2021-11-12 23:08:08,967 INFO L226 Difference]: Without dead ends: 68 [2021-11-12 23:08:08,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:08,971 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:08,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 66.59ms Time] [2021-11-12 23:08:08,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-12 23:08:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-11-12 23:08:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 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) [2021-11-12 23:08:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 134 transitions. [2021-11-12 23:08:08,984 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 134 transitions. Word has length 14 [2021-11-12 23:08:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:08,984 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 134 transitions. [2021-11-12 23:08:08,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 134 transitions. [2021-11-12 23:08:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:08,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:08,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:08,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 23:08:08,988 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash -492536092, now seen corresponding path program 3 times [2021-11-12 23:08:08,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:08,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684765427] [2021-11-12 23:08:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:08,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:09,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:09,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684765427] [2021-11-12 23:08:09,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684765427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:09,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699998869] [2021-11-12 23:08:09,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:08:09,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:09,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:09,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:09,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:08:09,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:08:09,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:08:09,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:08:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:09,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:09,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699998869] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:09,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:08:09,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-11-12 23:08:09,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424493519] [2021-11-12 23:08:09,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:09,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:09,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:09,285 INFO L87 Difference]: Start difference. First operand 58 states and 134 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:09,416 INFO L93 Difference]: Finished difference Result 98 states and 208 transitions. [2021-11-12 23:08:09,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:09,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:09,418 INFO L225 Difference]: With dead ends: 98 [2021-11-12 23:08:09,418 INFO L226 Difference]: Without dead ends: 98 [2021-11-12 23:08:09,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:09,419 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:09,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 112.50ms Time] [2021-11-12 23:08:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-12 23:08:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2021-11-12 23:08:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 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) [2021-11-12 23:08:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-11-12 23:08:09,426 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-11-12 23:08:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:09,426 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-11-12 23:08:09,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-11-12 23:08:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:09,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:09,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:09,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:09,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:09,650 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1183870748, now seen corresponding path program 4 times [2021-11-12 23:08:09,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:09,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806390411] [2021-11-12 23:08:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:09,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:09,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:09,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806390411] [2021-11-12 23:08:09,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806390411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:09,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:09,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:09,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837269665] [2021-11-12 23:08:09,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:09,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:09,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:09,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:09,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:09,687 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:09,815 INFO L93 Difference]: Finished difference Result 92 states and 195 transitions. [2021-11-12 23:08:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:09,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:09,817 INFO L225 Difference]: With dead ends: 92 [2021-11-12 23:08:09,817 INFO L226 Difference]: Without dead ends: 90 [2021-11-12 23:08:09,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:09,818 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:09,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 92.95ms Time] [2021-11-12 23:08:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-12 23:08:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-11-12 23:08:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.3934426229508197) internal successors, (146), 61 states have internal predecessors, (146), 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) [2021-11-12 23:08:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 146 transitions. [2021-11-12 23:08:09,825 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 146 transitions. Word has length 14 [2021-11-12 23:08:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:09,825 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 146 transitions. [2021-11-12 23:08:09,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 146 transitions. [2021-11-12 23:08:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:09,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:09,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:09,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 23:08:09,841 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:09,842 INFO L85 PathProgramCache]: Analyzing trace with hash -809835337, now seen corresponding path program 5 times [2021-11-12 23:08:09,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:09,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442382780] [2021-11-12 23:08:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:09,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:09,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:09,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442382780] [2021-11-12 23:08:09,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442382780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:09,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:09,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:09,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373471392] [2021-11-12 23:08:09,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:09,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:09,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:09,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:09,902 INFO L87 Difference]: Start difference. First operand 62 states and 146 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:09,990 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2021-11-12 23:08:09,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:09,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:09,992 INFO L225 Difference]: With dead ends: 62 [2021-11-12 23:08:09,992 INFO L226 Difference]: Without dead ends: 62 [2021-11-12 23:08:09,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:09,996 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:09,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.56ms Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 68.69ms Time] [2021-11-12 23:08:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-12 23:08:10,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2021-11-12 23:08:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 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) [2021-11-12 23:08:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 118 transitions. [2021-11-12 23:08:10,014 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 118 transitions. Word has length 14 [2021-11-12 23:08:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:10,014 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 118 transitions. [2021-11-12 23:08:10,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 118 transitions. [2021-11-12 23:08:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:08:10,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:10,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:10,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 23:08:10,019 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:10,019 INFO L85 PathProgramCache]: Analyzing trace with hash -655780742, now seen corresponding path program 5 times [2021-11-12 23:08:10,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:10,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962433139] [2021-11-12 23:08:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:10,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:10,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:10,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962433139] [2021-11-12 23:08:10,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962433139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:10,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:10,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:08:10,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183608341] [2021-11-12 23:08:10,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:10,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:10,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:10,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:10,060 INFO L87 Difference]: Start difference. First operand 52 states and 118 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:10,153 INFO L93 Difference]: Finished difference Result 56 states and 122 transitions. [2021-11-12 23:08:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:10,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-12 23:08:10,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:10,155 INFO L225 Difference]: With dead ends: 56 [2021-11-12 23:08:10,155 INFO L226 Difference]: Without dead ends: 52 [2021-11-12 23:08:10,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:10,156 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:10,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 69.94ms Time] [2021-11-12 23:08:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-12 23:08:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-12 23:08:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 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) [2021-11-12 23:08:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 116 transitions. [2021-11-12 23:08:10,162 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 116 transitions. Word has length 14 [2021-11-12 23:08:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:10,162 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 116 transitions. [2021-11-12 23:08:10,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-12 23:08:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 116 transitions. [2021-11-12 23:08:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:08:10,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:10,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:10,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 23:08:10,165 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:10,165 INFO L85 PathProgramCache]: Analyzing trace with hash 460108493, now seen corresponding path program 1 times [2021-11-12 23:08:10,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:10,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123962651] [2021-11-12 23:08:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:10,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:10,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:10,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123962651] [2021-11-12 23:08:10,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123962651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:10,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789114589] [2021-11-12 23:08:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:10,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:10,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:10,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:10,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:08:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:08:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:10,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:11,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789114589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:11,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540159303] [2021-11-12 23:08:11,026 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition 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) [2021-11-12 23:08:11,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:08:11,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-12 23:08:11,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817488156] [2021-11-12 23:08:11,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:11,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:08:11,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:11,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:08:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:08:11,032 INFO L87 Difference]: Start difference. First operand 52 states and 116 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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) [2021-11-12 23:08:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:11,488 INFO L93 Difference]: Finished difference Result 67 states and 145 transitions. [2021-11-12 23:08:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:08:11,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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 [2021-11-12 23:08:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:11,489 INFO L225 Difference]: With dead ends: 67 [2021-11-12 23:08:11,489 INFO L226 Difference]: Without dead ends: 44 [2021-11-12 23:08:11,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:08:11,491 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 224.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 265.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:11,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 429 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [15 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 265.86ms Time] [2021-11-12 23:08:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-12 23:08:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-11-12 23:08:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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) [2021-11-12 23:08:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 90 transitions. [2021-11-12 23:08:11,494 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 90 transitions. Word has length 15 [2021-11-12 23:08:11,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:11,494 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 90 transitions. [2021-11-12 23:08:11,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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) [2021-11-12 23:08:11,495 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 90 transitions. [2021-11-12 23:08:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:08:11,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:11,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:11,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:11,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-12 23:08:11,696 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1505949023, now seen corresponding path program 2 times [2021-11-12 23:08:11,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:11,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911907336] [2021-11-12 23:08:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:11,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:11,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:11,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911907336] [2021-11-12 23:08:11,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911907336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:11,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396806831] [2021-11-12 23:08:11,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:08:11,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:11,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:11,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:11,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:08:11,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:08:11,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:08:11,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:08:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:12,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:12,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396806831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:12,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458105839] [2021-11-12 23:08:12,577 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition 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) [2021-11-12 23:08:12,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:08:12,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-12 23:08:12,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205540002] [2021-11-12 23:08:12,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:12,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:08:12,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:08:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:08:12,585 INFO L87 Difference]: Start difference. First operand 42 states and 90 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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) [2021-11-12 23:08:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:12,996 INFO L93 Difference]: Finished difference Result 63 states and 125 transitions. [2021-11-12 23:08:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:08:12,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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 [2021-11-12 23:08:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:12,998 INFO L225 Difference]: With dead ends: 63 [2021-11-12 23:08:12,998 INFO L226 Difference]: Without dead ends: 54 [2021-11-12 23:08:12,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:08:13,000 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 237.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 281.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:13,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 396 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [15 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 281.58ms Time] [2021-11-12 23:08:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-12 23:08:13,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2021-11-12 23:08:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 43 states have internal predecessors, (97), 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) [2021-11-12 23:08:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 97 transitions. [2021-11-12 23:08:13,004 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 97 transitions. Word has length 15 [2021-11-12 23:08:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:13,004 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 97 transitions. [2021-11-12 23:08:13,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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) [2021-11-12 23:08:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 97 transitions. [2021-11-12 23:08:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:08:13,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:13,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:13,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:13,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-12 23:08:13,218 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:13,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1464606803, now seen corresponding path program 3 times [2021-11-12 23:08:13,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:13,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609040464] [2021-11-12 23:08:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:13,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:13,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:13,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609040464] [2021-11-12 23:08:13,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609040464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:13,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081832215] [2021-11-12 23:08:13,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:08:13,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:13,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:13,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:13,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:08:13,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:08:13,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:08:13,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:08:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:13,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:14,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081832215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:14,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670683774] [2021-11-12 23:08:14,095 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition 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) [2021-11-12 23:08:14,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:08:14,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-12 23:08:14,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946444796] [2021-11-12 23:08:14,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:14,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:08:14,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:14,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:08:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:08:14,105 INFO L87 Difference]: Start difference. First operand 44 states and 97 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:14,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:14,431 INFO L93 Difference]: Finished difference Result 53 states and 111 transitions. [2021-11-12 23:08:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:08:14,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-12 23:08:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:14,433 INFO L225 Difference]: With dead ends: 53 [2021-11-12 23:08:14,433 INFO L226 Difference]: Without dead ends: 36 [2021-11-12 23:08:14,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:08:14,434 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:14,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 292 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [23 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 206.42ms Time] [2021-11-12 23:08:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-12 23:08:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-12 23:08:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 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) [2021-11-12 23:08:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-11-12 23:08:14,438 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 15 [2021-11-12 23:08:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:14,438 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-11-12 23:08:14,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-11-12 23:08:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:08:14,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:14,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:14,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:14,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:14,650 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash 621383885, now seen corresponding path program 4 times [2021-11-12 23:08:14,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:14,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021460827] [2021-11-12 23:08:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:14,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:14,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:14,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021460827] [2021-11-12 23:08:14,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021460827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:14,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233271369] [2021-11-12 23:08:14,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:08:14,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:14,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:14,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:14,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:08:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:14,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:08:14,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:14,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:15,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233271369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:15,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556704347] [2021-11-12 23:08:15,441 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition 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) [2021-11-12 23:08:15,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:08:15,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-12 23:08:15,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115682093] [2021-11-12 23:08:15,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:15,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:08:15,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:08:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:08:15,445 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:16,363 INFO L93 Difference]: Finished difference Result 82 states and 153 transitions. [2021-11-12 23:08:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 23:08:16,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-12 23:08:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:16,364 INFO L225 Difference]: With dead ends: 82 [2021-11-12 23:08:16,364 INFO L226 Difference]: Without dead ends: 58 [2021-11-12 23:08:16,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:08:16,366 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.55ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 266.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:16,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 373 Unknown, 0 Unchecked, 2.55ms Time], IncrementalHoareTripleChecker [45 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 266.06ms Time] [2021-11-12 23:08:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-12 23:08:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-11-12 23:08:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 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) [2021-11-12 23:08:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 93 transitions. [2021-11-12 23:08:16,369 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 93 transitions. Word has length 15 [2021-11-12 23:08:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:16,369 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 93 transitions. [2021-11-12 23:08:16,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 93 transitions. [2021-11-12 23:08:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:08:16,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:16,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:16,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-12 23:08:16,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:16,582 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash 580041665, now seen corresponding path program 5 times [2021-11-12 23:08:16,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:16,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596224216] [2021-11-12 23:08:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:16,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:16,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:16,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596224216] [2021-11-12 23:08:16,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596224216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:16,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196899432] [2021-11-12 23:08:16,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:08:16,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:16,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:16,679 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:16,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:08:16,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:08:16,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:08:16,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:08:16,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:16,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:17,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196899432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:17,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938076856] [2021-11-12 23:08:17,199 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition 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) [2021-11-12 23:08:17,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:08:17,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-12 23:08:17,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870190631] [2021-11-12 23:08:17,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:17,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:08:17,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:08:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:08:17,202 INFO L87 Difference]: Start difference. First operand 46 states and 93 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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) [2021-11-12 23:08:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:17,709 INFO L93 Difference]: Finished difference Result 64 states and 121 transitions. [2021-11-12 23:08:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:08:17,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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 [2021-11-12 23:08:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:17,711 INFO L225 Difference]: With dead ends: 64 [2021-11-12 23:08:17,711 INFO L226 Difference]: Without dead ends: 46 [2021-11-12 23:08:17,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:08:17,712 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 153.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.57ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:17,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 312 Unknown, 0 Unchecked, 1.57ms Time], IncrementalHoareTripleChecker [30 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 197.81ms Time] [2021-11-12 23:08:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-12 23:08:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-11-12 23:08:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 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) [2021-11-12 23:08:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 88 transitions. [2021-11-12 23:08:17,716 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 88 transitions. Word has length 15 [2021-11-12 23:08:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:17,716 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 88 transitions. [2021-11-12 23:08:17,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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) [2021-11-12 23:08:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 88 transitions. [2021-11-12 23:08:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:08:17,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:17,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:17,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:17,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-12 23:08:17,942 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1997176571, now seen corresponding path program 6 times [2021-11-12 23:08:17,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:17,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204507399] [2021-11-12 23:08:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:17,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:18,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:18,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204507399] [2021-11-12 23:08:18,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204507399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:18,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117937983] [2021-11-12 23:08:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:08:18,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:18,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:18,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 23:08:18,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:08:18,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:08:18,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:08:18,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:18,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:18,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117937983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:18,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1863947907] [2021-11-12 23:08:18,669 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition 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) [2021-11-12 23:08:18,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:08:18,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-12 23:08:18,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273257988] [2021-11-12 23:08:18,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:18,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:08:18,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:18,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:08:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:08:18,674 INFO L87 Difference]: Start difference. First operand 44 states and 88 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 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) [2021-11-12 23:08:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:19,217 INFO L93 Difference]: Finished difference Result 57 states and 108 transitions. [2021-11-12 23:08:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:08:19,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 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 [2021-11-12 23:08:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:19,218 INFO L225 Difference]: With dead ends: 57 [2021-11-12 23:08:19,218 INFO L226 Difference]: Without dead ends: 48 [2021-11-12 23:08:19,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:08:19,224 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:19,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 317 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [30 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 201.90ms Time] [2021-11-12 23:08:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-12 23:08:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-12 23:08:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 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) [2021-11-12 23:08:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 86 transitions. [2021-11-12 23:08:19,228 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 86 transitions. Word has length 15 [2021-11-12 23:08:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:19,229 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 86 transitions. [2021-11-12 23:08:19,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 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) [2021-11-12 23:08:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 86 transitions. [2021-11-12 23:08:19,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:08:19,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:19,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:19,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:19,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:19,449 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:19,450 INFO L85 PathProgramCache]: Analyzing trace with hash 483719839, now seen corresponding path program 7 times [2021-11-12 23:08:19,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:19,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350310266] [2021-11-12 23:08:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:19,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:19,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:19,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350310266] [2021-11-12 23:08:19,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350310266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:19,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624899729] [2021-11-12 23:08:19,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:08:19,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:19,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:19,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:19,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 23:08:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:19,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:08:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:19,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624899729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:20,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133881851] [2021-11-12 23:08:20,162 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition 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) [2021-11-12 23:08:20,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:08:20,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-12 23:08:20,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429217068] [2021-11-12 23:08:20,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:20,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:08:20,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:20,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:08:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:08:20,167 INFO L87 Difference]: Start difference. First operand 44 states and 86 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:20,532 INFO L93 Difference]: Finished difference Result 57 states and 106 transitions. [2021-11-12 23:08:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:08:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-12 23:08:20,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:20,533 INFO L225 Difference]: With dead ends: 57 [2021-11-12 23:08:20,533 INFO L226 Difference]: Without dead ends: 48 [2021-11-12 23:08:20,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:08:20,535 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 208.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:20,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 348 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [12 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 208.88ms Time] [2021-11-12 23:08:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-12 23:08:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-11-12 23:08:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 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) [2021-11-12 23:08:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-11-12 23:08:20,539 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 15 [2021-11-12 23:08:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:20,539 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-11-12 23:08:20,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-11-12 23:08:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:08:20,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:20,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:20,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-12 23:08:20,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:20,766 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:20,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash 442377619, now seen corresponding path program 8 times [2021-11-12 23:08:20,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:20,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357930013] [2021-11-12 23:08:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:20,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:20,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:20,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357930013] [2021-11-12 23:08:20,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357930013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:20,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537850195] [2021-11-12 23:08:20,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:08:20,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:20,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:20,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:20,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:08:20,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:08:20,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:08:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:08:20,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:21,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:21,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537850195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:21,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211306646] [2021-11-12 23:08:21,461 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition 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) [2021-11-12 23:08:21,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:08:21,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-12 23:08:21,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773061809] [2021-11-12 23:08:21,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:21,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:08:21,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:08:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:08:21,466 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2021-11-12 23:08:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:21,757 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-11-12 23:08:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:08:21,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 [2021-11-12 23:08:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:21,758 INFO L225 Difference]: With dead ends: 57 [2021-11-12 23:08:21,759 INFO L226 Difference]: Without dead ends: 36 [2021-11-12 23:08:21,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:08:21,760 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:21,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [16 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 159.38ms Time] [2021-11-12 23:08:21,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-12 23:08:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-11-12 23:08:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 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) [2021-11-12 23:08:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 56 transitions. [2021-11-12 23:08:21,763 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 56 transitions. Word has length 15 [2021-11-12 23:08:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:21,763 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 56 transitions. [2021-11-12 23:08:21,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2021-11-12 23:08:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 56 transitions. [2021-11-12 23:08:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:08:21,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:21,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:21,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:21,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-12 23:08:21,978 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-12 23:08:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:21,978 INFO L85 PathProgramCache]: Analyzing trace with hash 320475189, now seen corresponding path program 9 times [2021-11-12 23:08:21,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:21,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675544384] [2021-11-12 23:08:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:21,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:22,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:22,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675544384] [2021-11-12 23:08:22,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675544384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:22,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553378336] [2021-11-12 23:08:22,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:08:22,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:22,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:22,085 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:22,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 23:08:22,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:08:22,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:08:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:08:22,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:22,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:22,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553378336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:22,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102722724] [2021-11-12 23:08:22,611 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition 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) [2021-11-12 23:08:22,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:08:22,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-12 23:08:22,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46477997] [2021-11-12 23:08:22,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:22,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:08:22,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:08:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:08:22,616 INFO L87 Difference]: Start difference. First operand 34 states and 56 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2021-11-12 23:08:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:22,892 INFO L93 Difference]: Finished difference Result 37 states and 61 transitions. [2021-11-12 23:08:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:08:22,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 [2021-11-12 23:08:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:22,893 INFO L225 Difference]: With dead ends: 37 [2021-11-12 23:08:22,894 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:08:22,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:08:22,895 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:22,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [9 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 124.39ms Time] [2021-11-12 23:08:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:08:22,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:08:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-12 23:08:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:08:22,897 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-11-12 23:08:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:22,897 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:08:22,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2021-11-12 23:08:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:08:22,898 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:08:22,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-11-12 23:08:22,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-11-12 23:08:22,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-11-12 23:08:22,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:23,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-12 23:08:23,104 INFO L732 BasicCegarLoop]: Path program histogram: [9, 6, 5, 5] [2021-11-12 23:08:23,107 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-12 23:08:23,107 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:08:23,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:08:23 BasicIcfg [2021-11-12 23:08:23,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:08:23,111 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:08:23,111 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:08:23,111 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:08:23,112 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:08:01" (3/4) ... [2021-11-12 23:08:23,115 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 23:08:23,123 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-11-12 23:08:23,123 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-11-12 23:08:23,128 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-11-12 23:08:23,128 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-12 23:08:23,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-12 23:08:23,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 23:08:23,165 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 23:08:23,165 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:08:23,166 INFO L158 Benchmark]: Toolchain (without parser) took 21963.29ms. Allocated memory was 115.3MB in the beginning and 205.5MB in the end (delta: 90.2MB). Free memory was 76.8MB in the beginning and 114.7MB in the end (delta: -37.9MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. [2021-11-12 23:08:23,166 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory was 93.9MB in the beginning and 93.9MB in the end (delta: 32.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:08:23,167 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.62ms. Allocated memory is still 115.3MB. Free memory was 76.5MB in the beginning and 89.8MB in the end (delta: -13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:08:23,167 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.93ms. Allocated memory is still 115.3MB. Free memory was 89.8MB in the beginning and 88.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:08:23,168 INFO L158 Benchmark]: Boogie Preprocessor took 22.56ms. Allocated memory is still 115.3MB. Free memory was 88.2MB in the beginning and 86.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:08:23,168 INFO L158 Benchmark]: RCFGBuilder took 327.05ms. Allocated memory is still 115.3MB. Free memory was 86.7MB in the beginning and 75.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:08:23,169 INFO L158 Benchmark]: TraceAbstraction took 21240.43ms. Allocated memory was 115.3MB in the beginning and 205.5MB in the end (delta: 90.2MB). Free memory was 75.1MB in the beginning and 117.7MB in the end (delta: -42.6MB). Peak memory consumption was 49.0MB. Max. memory is 16.1GB. [2021-11-12 23:08:23,169 INFO L158 Benchmark]: Witness Printer took 54.42ms. Allocated memory is still 205.5MB. Free memory was 117.7MB in the beginning and 114.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:08:23,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory was 93.9MB in the beginning and 93.9MB in the end (delta: 32.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.62ms. Allocated memory is still 115.3MB. Free memory was 76.5MB in the beginning and 89.8MB in the end (delta: -13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.93ms. Allocated memory is still 115.3MB. Free memory was 89.8MB in the beginning and 88.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.56ms. Allocated memory is still 115.3MB. Free memory was 88.2MB in the beginning and 86.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 327.05ms. Allocated memory is still 115.3MB. Free memory was 86.7MB in the beginning and 75.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 21240.43ms. Allocated memory was 115.3MB in the beginning and 205.5MB in the end (delta: 90.2MB). Free memory was 75.1MB in the beginning and 117.7MB in the end (delta: -42.6MB). Peak memory consumption was 49.0MB. Max. memory is 16.1GB. * Witness Printer took 54.42ms. Allocated memory is still 205.5MB. Free memory was 117.7MB in the beginning and 114.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 88 PlacesBefore, 23 PlacesAfterwards, 87 TransitionsBefore, 18 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 46 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 80 TotalNumberOfCompositions, 569 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 569, positive: 569, positive conditional: 0, positive unconditional: 569, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 392, positive: 392, positive conditional: 0, positive unconditional: 392, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 392, positive: 389, positive conditional: 0, positive unconditional: 389, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 14, positive: 14, positive conditional: 0, positive unconditional: 14, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 569, positive: 177, positive conditional: 0, positive unconditional: 177, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 392, unknown conditional: 0, unknown unconditional: 392] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 79]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 104 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 21.1s, OverallIterations: 25, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 698 SdHoareTripleChecker+Valid, 3311.31ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 698 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2701.00ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1921 mSDsCounter, 250 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4651 IncrementalHoareTripleChecker+Invalid, 4901 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 250 mSolverCounterUnsat, 0 mSDtfsCounter, 4651 mSolverCounterSat, 33.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 231 SyntacticMatches, 31 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=13, InterpolantAutomatonStates: 222, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 264 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 516 NumberOfCodeBlocks, 516 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 632 ConstructedInterpolants, 0 QuantifiedInterpolants, 4415 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1138 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 47 InterpolantComputations, 16 PerfectInterpolantSequences, 10/68 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-12 23:08:23,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a6e560-7ed2-4a0e-a915-4fdd6285195e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE