./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE --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 fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:21:39,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:21:39,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:21:40,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:21:40,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:21:40,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:21:40,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:21:40,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:21:40,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:21:40,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:21:40,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:21:40,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:21:40,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:21:40,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:21:40,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:21:40,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:21:40,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:21:40,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:21:40,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:21:40,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:21:40,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:21:40,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:21:40,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:21:40,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:21:40,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:21:40,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:21:40,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:21:40,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:21:40,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:21:40,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:21:40,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:21:40,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:21:40,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:21:40,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:21:40,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:21:40,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:21:40,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:21:40,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:21:40,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:21:40,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:21:40,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:21:40,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:21:40,160 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:21:40,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:21:40,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:21:40,162 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:21:40,162 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:21:40,162 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:21:40,163 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:21:40,163 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:21:40,163 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:21:40,164 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:21:40,164 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:21:40,164 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:21:40,164 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:21:40,165 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:21:40,165 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:21:40,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:21:40,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:21:40,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:21:40,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:21:40,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:21:40,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:21:40,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:21:40,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:21:40,168 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:21:40,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:21:40,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:21:40,169 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:21:40,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:21:40,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:21:40,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:21:40,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:21:40,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:21:40,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:21:40,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:21:40,171 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:21:40,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:21:40,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:21:40,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:21:40,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:21:40,173 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_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2021-10-24 10:21:40,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:21:40,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:21:40,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:21:40,509 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:21:40,510 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:21:40,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-10-24 10:21:40,613 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/data/eabc2f7d2/ce1a7e65843549b48e1475531fe36910/FLAGcb0bee476 [2021-10-24 10:21:41,278 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:21:41,278 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-10-24 10:21:41,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/data/eabc2f7d2/ce1a7e65843549b48e1475531fe36910/FLAGcb0bee476 [2021-10-24 10:21:41,643 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/data/eabc2f7d2/ce1a7e65843549b48e1475531fe36910 [2021-10-24 10:21:41,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:21:41,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:21:41,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:21:41,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:21:41,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:21:41,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:21:41" (1/1) ... [2021-10-24 10:21:41,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c976fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:41, skipping insertion in model container [2021-10-24 10:21:41,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:21:41" (1/1) ... [2021-10-24 10:21:41,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:21:41,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:21:41,956 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_dad45c2e-b962-4325-afe2-fd8735aed696/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2021-10-24 10:21:41,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:21:41,972 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:21:41,998 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_dad45c2e-b962-4325-afe2-fd8735aed696/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2021-10-24 10:21:41,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:21:42,025 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:21:42,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42 WrapperNode [2021-10-24 10:21:42,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:21:42,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:21:42,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:21:42,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:21:42,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:21:42,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:21:42,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:21:42,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:21:42,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:21:42,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:21:42,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:21:42,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:21:42,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (1/1) ... [2021-10-24 10:21:42,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:21:42,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:21:42,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:21:42,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:21:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-24 10:21:42,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-24 10:21:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-24 10:21:42,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-24 10:21:42,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:21:42,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:21:42,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-24 10:21:42,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:21:42,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:21:42,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 10:21:42,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:21:42,227 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-24 10:21:42,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:21:42,505 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-24 10:21:42,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:21:42 BoogieIcfgContainer [2021-10-24 10:21:42,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:21:42,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:21:42,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:21:42,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:21:42,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:21:41" (1/3) ... [2021-10-24 10:21:42,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5030de06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:21:42, skipping insertion in model container [2021-10-24 10:21:42,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:21:42" (2/3) ... [2021-10-24 10:21:42,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5030de06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:21:42, skipping insertion in model container [2021-10-24 10:21:42,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:21:42" (3/3) ... [2021-10-24 10:21:42,524 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2021-10-24 10:21:42,531 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-24 10:21:42,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:21:42,532 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:21:42,532 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-24 10:21:42,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,571 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,576 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,576 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,584 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,585 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,586 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,591 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,591 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,592 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:21:42,604 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-24 10:21:42,707 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:21:42,714 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 [2021-10-24 10:21:42,731 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-24 10:21:42,750 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-24 10:21:42,763 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 168 flow [2021-10-24 10:21:42,767 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 168 flow [2021-10-24 10:21:42,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 168 flow [2021-10-24 10:21:42,837 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-10-24 10:21:42,838 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-24 10:21:42,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-10-24 10:21:42,847 INFO L116 LiptonReduction]: Number of co-enabled transitions 368 [2021-10-24 10:21:46,654 INFO L131 LiptonReduction]: Checked pairs total: 382 [2021-10-24 10:21:46,654 INFO L133 LiptonReduction]: Total number of compositions: 69 [2021-10-24 10:21:46,667 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-10-24 10:21:46,681 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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) [2021-10-24 10:21:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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) [2021-10-24 10:21:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 10:21:46,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:21:46,693 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:21:46,694 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-24 10:21:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:21:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash -10847143, now seen corresponding path program 1 times [2021-10-24 10:21:46,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:21:46,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765580776] [2021-10-24 10:21:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:46,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:21:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:47,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:21:47,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765580776] [2021-10-24 10:21:47,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765580776] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:21:47,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:21:47,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-24 10:21:47,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419761969] [2021-10-24 10:21:47,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:21:47,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:21:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:21:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:21:47,087 INFO L87 Difference]: Start difference. First operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:21:47,150 INFO L93 Difference]: Finished difference Result 37 states and 77 transitions. [2021-10-24 10:21:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:21:47,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-24 10:21:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:21:47,169 INFO L225 Difference]: With dead ends: 37 [2021-10-24 10:21:47,169 INFO L226 Difference]: Without dead ends: 32 [2021-10-24 10:21:47,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:21:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-24 10:21:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-24 10:21:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 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) [2021-10-24 10:21:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 67 transitions. [2021-10-24 10:21:47,233 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 67 transitions. Word has length 11 [2021-10-24 10:21:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:21:47,233 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 67 transitions. [2021-10-24 10:21:47,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 67 transitions. [2021-10-24 10:21:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:21:47,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:21:47,236 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:21:47,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:21:47,237 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-24 10:21:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:21:47,238 INFO L82 PathProgramCache]: Analyzing trace with hash -408597772, now seen corresponding path program 1 times [2021-10-24 10:21:47,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:21:47,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487680046] [2021-10-24 10:21:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:47,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:21:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:47,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:21:47,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487680046] [2021-10-24 10:21:47,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487680046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:21:47,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801157628] [2021-10-24 10:21:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:47,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:21:47,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:21:47,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:21:47,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:21:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 10:21:47,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:21:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:47,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:21:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:48,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801157628] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:21:48,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:21:48,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-10-24 10:21:48,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136550717] [2021-10-24 10:21:48,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:21:48,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:21:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:21:48,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:21:48,043 INFO L87 Difference]: Start difference. First operand 32 states and 67 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:21:48,105 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2021-10-24 10:21:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:21:48,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 10:21:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:21:48,110 INFO L225 Difference]: With dead ends: 67 [2021-10-24 10:21:48,113 INFO L226 Difference]: Without dead ends: 62 [2021-10-24 10:21:48,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:21:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-24 10:21:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 34. [2021-10-24 10:21:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 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) [2021-10-24 10:21:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 83 transitions. [2021-10-24 10:21:48,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 83 transitions. Word has length 12 [2021-10-24 10:21:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:21:48,131 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 83 transitions. [2021-10-24 10:21:48,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 83 transitions. [2021-10-24 10:21:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:21:48,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:21:48,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:21:48,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:21:48,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:21:48,350 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-24 10:21:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:21:48,351 INFO L82 PathProgramCache]: Analyzing trace with hash -860303794, now seen corresponding path program 1 times [2021-10-24 10:21:48,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:21:48,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948769545] [2021-10-24 10:21:48,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:48,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:21:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:48,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:21:48,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948769545] [2021-10-24 10:21:48,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948769545] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:21:48,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:21:48,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:21:48,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792352868] [2021-10-24 10:21:48,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:21:48,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:21:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:21:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:21:48,542 INFO L87 Difference]: Start difference. First operand 34 states and 83 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:21:48,567 INFO L93 Difference]: Finished difference Result 42 states and 89 transitions. [2021-10-24 10:21:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:21:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 10:21:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:21:48,583 INFO L225 Difference]: With dead ends: 42 [2021-10-24 10:21:48,583 INFO L226 Difference]: Without dead ends: 34 [2021-10-24 10:21:48,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:21:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-24 10:21:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-24 10:21:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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) [2021-10-24 10:21:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 77 transitions. [2021-10-24 10:21:48,592 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 77 transitions. Word has length 12 [2021-10-24 10:21:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:21:48,592 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 77 transitions. [2021-10-24 10:21:48,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 77 transitions. [2021-10-24 10:21:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:21:48,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:21:48,594 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:21:48,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:21:48,595 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-24 10:21:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:21:48,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2089316486, now seen corresponding path program 2 times [2021-10-24 10:21:48,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:21:48,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476761673] [2021-10-24 10:21:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:48,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:21:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:48,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:21:48,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476761673] [2021-10-24 10:21:48,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476761673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:21:48,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541268929] [2021-10-24 10:21:48,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:21:48,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:21:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:21:48,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:21:48,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:21:48,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:21:48,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:21:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 10:21:48,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:21:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:48,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:21:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:49,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541268929] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:21:49,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:21:49,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-10-24 10:21:49,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774056091] [2021-10-24 10:21:49,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:21:49,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:21:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:21:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:21:49,024 INFO L87 Difference]: Start difference. First operand 34 states and 77 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:21:49,081 INFO L93 Difference]: Finished difference Result 75 states and 156 transitions. [2021-10-24 10:21:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:21:49,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 10:21:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:21:49,096 INFO L225 Difference]: With dead ends: 75 [2021-10-24 10:21:49,099 INFO L226 Difference]: Without dead ends: 70 [2021-10-24 10:21:49,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:21:49,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-24 10:21:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2021-10-24 10:21:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 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) [2021-10-24 10:21:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2021-10-24 10:21:49,114 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2021-10-24 10:21:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:21:49,116 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2021-10-24 10:21:49,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2021-10-24 10:21:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:21:49,118 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:21:49,118 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:21:49,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:21:49,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-24 10:21:49,346 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-24 10:21:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:21:49,346 INFO L82 PathProgramCache]: Analyzing trace with hash -305671405, now seen corresponding path program 1 times [2021-10-24 10:21:49,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:21:49,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471585517] [2021-10-24 10:21:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:49,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:21:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:49,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:21:49,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471585517] [2021-10-24 10:21:49,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471585517] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:21:49,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126934355] [2021-10-24 10:21:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:49,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:21:49,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:21:49,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:21:49,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-24 10:21:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:21:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:21:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:49,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:21:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:50,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126934355] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:21:50,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:21:50,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2021-10-24 10:21:50,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098212282] [2021-10-24 10:21:50,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:21:50,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:21:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:21:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:21:50,047 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 6 states, 5 states have (on average 2.6) 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) [2021-10-24 10:21:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:21:50,097 INFO L93 Difference]: Finished difference Result 67 states and 151 transitions. [2021-10-24 10:21:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:21:50,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) 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 [2021-10-24 10:21:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:21:50,100 INFO L225 Difference]: With dead ends: 67 [2021-10-24 10:21:50,101 INFO L226 Difference]: Without dead ends: 52 [2021-10-24 10:21:50,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:21:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-24 10:21:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2021-10-24 10:21:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.441860465116279) internal successors, (105), 43 states have internal predecessors, (105), 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) [2021-10-24 10:21:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 105 transitions. [2021-10-24 10:21:50,126 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 105 transitions. Word has length 13 [2021-10-24 10:21:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:21:50,127 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 105 transitions. [2021-10-24 10:21:50,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) 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) [2021-10-24 10:21:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 105 transitions. [2021-10-24 10:21:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:21:50,131 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:21:50,131 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:21:50,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:21:50,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:21:50,360 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-24 10:21:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:21:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash 412831321, now seen corresponding path program 2 times [2021-10-24 10:21:50,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:21:50,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005175292] [2021-10-24 10:21:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:50,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:21:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:21:50,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:21:50,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005175292] [2021-10-24 10:21:50,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005175292] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:21:50,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:21:50,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:21:50,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253032296] [2021-10-24 10:21:50,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:21:50,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:21:50,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:21:50,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:21:50,430 INFO L87 Difference]: Start difference. First operand 44 states and 105 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-10-24 10:21:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:21:50,450 INFO L93 Difference]: Finished difference Result 46 states and 108 transitions. [2021-10-24 10:21:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:21:50,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2021-10-24 10:21:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:21:50,454 INFO L225 Difference]: With dead ends: 46 [2021-10-24 10:21:50,455 INFO L226 Difference]: Without dead ends: 46 [2021-10-24 10:21:50,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:21:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-24 10:21:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-24 10:21:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 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) [2021-10-24 10:21:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2021-10-24 10:21:50,472 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 13 [2021-10-24 10:21:50,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:21:50,473 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2021-10-24 10:21:50,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-10-24 10:21:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2021-10-24 10:21:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:21:50,475 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:21:50,475 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:21:50,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 10:21:50,475 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-24 10:21:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:21:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash 723318331, now seen corresponding path program 2 times [2021-10-24 10:21:50,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:21:50,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331979061] [2021-10-24 10:21:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:50,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:21:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:50,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:21:50,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331979061] [2021-10-24 10:21:50,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331979061] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:21:50,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733894623] [2021-10-24 10:21:50,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:21:50,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:21:50,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:21:50,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:21:50,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-24 10:21:50,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:21:50,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:21:50,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:21:50,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:21:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:50,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:21:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:51,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733894623] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:21:51,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:21:51,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2021-10-24 10:21:51,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34370367] [2021-10-24 10:21:51,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:21:51,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:21:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:21:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:21:51,081 INFO L87 Difference]: Start difference. First operand 46 states and 108 transitions. Second operand has 6 states, 5 states have (on average 2.6) 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) [2021-10-24 10:21:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:21:51,118 INFO L93 Difference]: Finished difference Result 53 states and 117 transitions. [2021-10-24 10:21:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:21:51,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) 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 [2021-10-24 10:21:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:21:51,120 INFO L225 Difference]: With dead ends: 53 [2021-10-24 10:21:51,120 INFO L226 Difference]: Without dead ends: 44 [2021-10-24 10:21:51,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:21:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-24 10:21:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-10-24 10:21:51,139 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) [2021-10-24 10:21:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 90 transitions. [2021-10-24 10:21:51,142 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 90 transitions. Word has length 13 [2021-10-24 10:21:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:21:51,143 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 90 transitions. [2021-10-24 10:21:51,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) 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) [2021-10-24 10:21:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 90 transitions. [2021-10-24 10:21:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:21:51,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:21:51,146 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:21:51,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:21:51,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:21:51,364 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-24 10:21:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:21:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1039209911, now seen corresponding path program 3 times [2021-10-24 10:21:51,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:21:51,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32323721] [2021-10-24 10:21:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:51,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:21:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:21:51,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:21:51,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32323721] [2021-10-24 10:21:51,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32323721] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:21:51,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:21:51,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:21:51,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326685554] [2021-10-24 10:21:51,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:21:51,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:21:51,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:21:51,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:21:51,441 INFO L87 Difference]: Start difference. First operand 42 states and 90 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-10-24 10:21:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:21:51,464 INFO L93 Difference]: Finished difference Result 34 states and 68 transitions. [2021-10-24 10:21:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:21:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2021-10-24 10:21:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:21:51,466 INFO L225 Difference]: With dead ends: 34 [2021-10-24 10:21:51,466 INFO L226 Difference]: Without dead ends: 34 [2021-10-24 10:21:51,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:21:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-24 10:21:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-24 10:21:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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) [2021-10-24 10:21:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-10-24 10:21:51,472 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 13 [2021-10-24 10:21:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:21:51,473 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-10-24 10:21:51,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-10-24 10:21:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-10-24 10:21:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 10:21:51,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:21:51,474 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:21:51,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-24 10:21:51,475 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-24 10:21:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:21:51,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1637283546, now seen corresponding path program 3 times [2021-10-24 10:21:51,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:21:51,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504939249] [2021-10-24 10:21:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:21:51,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:21:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:21:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:21:51,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:21:51,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504939249] [2021-10-24 10:21:51,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504939249] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:21:51,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67596256] [2021-10-24 10:21:51,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:21:51,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:21:51,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:21:51,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:21:51,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-24 10:21:51,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:21:51,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:21:51,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:21:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:21:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:51,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:21:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:21:52,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67596256] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:21:52,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355010486] [2021-10-24 10:21:52,026 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) 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) [2021-10-24 10:21:52,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:21:52,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2021-10-24 10:21:52,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282553469] [2021-10-24 10:21:52,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-24 10:21:52,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:21:52,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-24 10:21:52,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:21:52,032 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:21:52,442 INFO L93 Difference]: Finished difference Result 57 states and 123 transitions. [2021-10-24 10:21:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-24 10:21:52,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-24 10:21:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:21:52,443 INFO L225 Difference]: With dead ends: 57 [2021-10-24 10:21:52,443 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:21:52,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-10-24 10:21:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:21:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:21:52,445 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) [2021-10-24 10:21:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:21:52,445 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-24 10:21:52,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:21:52,446 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:21:52,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:21:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:21:52,446 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:21:52,449 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:21:52,450 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-24 10:21:52,450 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-24 10:21:52,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-24 10:21:52,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:21:52,656 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-24 10:21:52,656 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:21:52,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:21:52 BasicIcfg [2021-10-24 10:21:52,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:21:52,659 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:21:52,659 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:21:52,660 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:21:52,660 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:21:42" (3/4) ... [2021-10-24 10:21:52,663 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:21:52,671 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-24 10:21:52,671 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-24 10:21:52,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-24 10:21:52,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-24 10:21:52,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:21:52,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:21:52,720 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:21:52,720 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:21:52,722 INFO L168 Benchmark]: Toolchain (without parser) took 11072.40 ms. Allocated memory was 88.1 MB in the beginning and 134.2 MB in the end (delta: 46.1 MB). Free memory was 56.9 MB in the beginning and 63.7 MB in the end (delta: -6.7 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. [2021-10-24 10:21:52,723 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 88.1 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:21:52,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.56 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 56.7 MB in the beginning and 87.3 MB in the end (delta: -30.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:21:52,724 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.34 ms. Allocated memory is still 111.1 MB. Free memory was 87.3 MB in the beginning and 85.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:21:52,724 INFO L168 Benchmark]: Boogie Preprocessor took 32.74 ms. Allocated memory is still 111.1 MB. Free memory was 85.9 MB in the beginning and 84.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:21:52,725 INFO L168 Benchmark]: RCFGBuilder took 394.54 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 73.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:21:52,725 INFO L168 Benchmark]: TraceAbstraction took 10144.87 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 73.0 MB in the beginning and 66.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:21:52,726 INFO L168 Benchmark]: Witness Printer took 61.20 ms. Allocated memory is still 134.2 MB. Free memory was 66.8 MB in the beginning and 63.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:21:52,729 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 88.1 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.56 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 56.7 MB in the beginning and 87.3 MB in the end (delta: -30.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.34 ms. Allocated memory is still 111.1 MB. Free memory was 87.3 MB in the beginning and 85.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.74 ms. Allocated memory is still 111.1 MB. Free memory was 85.9 MB in the beginning and 84.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 394.54 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 73.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10144.87 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 73.0 MB in the beginning and 66.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. * Witness Printer took 61.20 ms. Allocated memory is still 134.2 MB. Free memory was 66.8 MB in the beginning and 63.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3887.4ms, 77 PlacesBefore, 21 PlacesAfterwards, 76 TransitionsBefore, 16 TransitionsAfterwards, 368 CoEnabledTransitionPairs, 6 FixpointIterations, 42 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 69 TotalNumberOfCompositions, 382 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 382, positive: 382, positive conditional: 0, positive unconditional: 382, 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: 273, positive: 273, positive conditional: 0, positive unconditional: 273, 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: 273, positive: 273, positive conditional: 0, positive unconditional: 273, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 382, positive: 109, positive conditional: 0, positive unconditional: 109, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 273, unknown conditional: 0, unknown unconditional: 273] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 70]: 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, 87 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 9950.1ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 24.2ms, AutomataDifference: 874.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3950.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 131 SDtfs, 183 SDslu, 210 SDs, 0 SdLazy, 217 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 262.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 681.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=6, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 140.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 74 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 74.7ms SsaConstructionTime, 531.8ms SatisfiabilityAnalysisTime, 2464.9ms InterpolantComputationTime, 177 NumberOfCodeBlocks, 177 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 1115 SizeOfPredicates, 10 NumberOfNonLiveVariables, 467 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 19 InterpolantComputations, 8 PerfectInterpolantSequences, 25/37 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! [2021-10-24 10:21:52,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad45c2e-b962-4325-afe2-fd8735aed696/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...