./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label36.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_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/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_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label36.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/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_4c24ec97-7024-45a2-a98a-7a0eb184fee5/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 16921798414ec528dd37161230657dad4883a0777e5a6c6f07453756efda755c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:09:08,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:09:08,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:09:09,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:09:09,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:09:09,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:09:09,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:09:09,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:09:09,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:09:09,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:09:09,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:09:09,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:09:09,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:09:09,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:09:09,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:09:09,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:09:09,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:09:09,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:09:09,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:09:09,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:09:09,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:09:09,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:09:09,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:09:09,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:09:09,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:09:09,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:09:09,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:09:09,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:09:09,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:09:09,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:09:09,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:09:09,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:09:09,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:09:09,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:09:09,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:09:09,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:09:09,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:09:09,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:09:09,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:09:09,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:09:09,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:09:09,079 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:09:09,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:09:09,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:09:09,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:09:09,111 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:09:09,111 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:09:09,111 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:09:09,111 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:09:09,112 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:09:09,112 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:09:09,112 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:09:09,112 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:09:09,113 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:09:09,113 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:09:09,113 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:09:09,113 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:09:09,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:09:09,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:09:09,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:09:09,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:09:09,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:09:09,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:09:09,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:09:09,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:09:09,116 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:09:09,116 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:09:09,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:09:09,116 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:09:09,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:09:09,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:09:09,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:09:09,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:09,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:09:09,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:09:09,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:09:09,118 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:09:09,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:09:09,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:09:09,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:09:09,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:09:09,119 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_4c24ec97-7024-45a2-a98a-7a0eb184fee5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16921798414ec528dd37161230657dad4883a0777e5a6c6f07453756efda755c [2021-10-24 11:09:09,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:09:09,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:09:09,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:09:09,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:09:09,422 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:09:09,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/eca-rers2012/Problem02_label36.c [2021-10-24 11:09:09,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/data/bf8347279/d0efa6785d96481cbe7283f60c1fc31d/FLAGf2468640e [2021-10-24 11:09:10,060 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:09:10,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/sv-benchmarks/c/eca-rers2012/Problem02_label36.c [2021-10-24 11:09:10,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/data/bf8347279/d0efa6785d96481cbe7283f60c1fc31d/FLAGf2468640e [2021-10-24 11:09:10,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/data/bf8347279/d0efa6785d96481cbe7283f60c1fc31d [2021-10-24 11:09:10,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:09:10,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:09:10,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:10,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:09:10,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:09:10,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:10,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d4eee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10, skipping insertion in model container [2021-10-24 11:09:10,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:10,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:09:10,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:09:10,786 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_4c24ec97-7024-45a2-a98a-7a0eb184fee5/sv-benchmarks/c/eca-rers2012/Problem02_label36.c[20425,20438] [2021-10-24 11:09:10,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:10,809 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:09:10,935 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_4c24ec97-7024-45a2-a98a-7a0eb184fee5/sv-benchmarks/c/eca-rers2012/Problem02_label36.c[20425,20438] [2021-10-24 11:09:10,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:10,971 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:09:10,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10 WrapperNode [2021-10-24 11:09:10,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:10,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:09:10,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:09:10,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:09:10,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:09:11,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:09:11,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:09:11,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:09:11,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:09:11,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:09:11,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:09:11,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:09:11,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (1/1) ... [2021-10-24 11:09:11,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:11,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:09:11,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:09:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 11:09:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:09:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:09:11,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:09:13,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:09:13,100 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 11:09:13,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:13 BoogieIcfgContainer [2021-10-24 11:09:13,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:09:13,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:09:13,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:09:13,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:09:13,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:09:10" (1/3) ... [2021-10-24 11:09:13,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156ff519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:09:13, skipping insertion in model container [2021-10-24 11:09:13,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:10" (2/3) ... [2021-10-24 11:09:13,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156ff519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:09:13, skipping insertion in model container [2021-10-24 11:09:13,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:13" (3/3) ... [2021-10-24 11:09:13,112 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label36.c [2021-10-24 11:09:13,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:09:13,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 11:09:13,176 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:09:13,185 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 11:09:13,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 11:09:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 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 11:09:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-24 11:09:13,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:13,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:13,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:13,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1243333366, now seen corresponding path program 1 times [2021-10-24 11:09:13,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:13,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856237748] [2021-10-24 11:09:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:13,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:13,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:09:13,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856237748] [2021-10-24 11:09:13,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856237748] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:13,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:13,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:09:13,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617184392] [2021-10-24 11:09:13,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:09:13,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:09:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:13,661 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:14,042 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2021-10-24 11:09:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:09:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-10-24 11:09:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:14,056 INFO L225 Difference]: With dead ends: 251 [2021-10-24 11:09:14,056 INFO L226 Difference]: Without dead ends: 163 [2021-10-24 11:09:14,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-24 11:09:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-10-24 11:09:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.7777777777777777) internal successors, (288), 162 states have internal predecessors, (288), 0 states have call successors, (0), 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 11:09:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 288 transitions. [2021-10-24 11:09:14,108 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 288 transitions. Word has length 80 [2021-10-24 11:09:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:14,109 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 288 transitions. [2021-10-24 11:09:14,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 288 transitions. [2021-10-24 11:09:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-24 11:09:14,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:14,115 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:14,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 11:09:14,116 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:14,116 INFO L82 PathProgramCache]: Analyzing trace with hash 726159637, now seen corresponding path program 1 times [2021-10-24 11:09:14,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:14,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209793319] [2021-10-24 11:09:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:14,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:14,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:09:14,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209793319] [2021-10-24 11:09:14,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209793319] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:14,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:14,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:09:14,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069442066] [2021-10-24 11:09:14,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:09:14,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:09:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:14,253 INFO L87 Difference]: Start difference. First operand 163 states and 288 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:09:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:14,632 INFO L93 Difference]: Finished difference Result 487 states and 862 transitions. [2021-10-24 11:09:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:09:14,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-10-24 11:09:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:14,641 INFO L225 Difference]: With dead ends: 487 [2021-10-24 11:09:14,641 INFO L226 Difference]: Without dead ends: 325 [2021-10-24 11:09:14,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-10-24 11:09:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2021-10-24 11:09:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.704968944099379) internal successors, (549), 322 states have internal predecessors, (549), 0 states have call successors, (0), 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 11:09:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 549 transitions. [2021-10-24 11:09:14,684 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 549 transitions. Word has length 98 [2021-10-24 11:09:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:14,686 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 549 transitions. [2021-10-24 11:09:14,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:09:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 549 transitions. [2021-10-24 11:09:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-24 11:09:14,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:14,699 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:14,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 11:09:14,700 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:14,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1167851045, now seen corresponding path program 1 times [2021-10-24 11:09:14,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:14,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227762213] [2021-10-24 11:09:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:14,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:14,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:09:14,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227762213] [2021-10-24 11:09:14,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227762213] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:14,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:14,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:09:14,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618221283] [2021-10-24 11:09:14,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:09:14,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:09:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:14,825 INFO L87 Difference]: Start difference. First operand 323 states and 549 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 11:09:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:15,021 INFO L93 Difference]: Finished difference Result 645 states and 1097 transitions. [2021-10-24 11:09:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:09:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-10-24 11:09:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:15,024 INFO L225 Difference]: With dead ends: 645 [2021-10-24 11:09:15,024 INFO L226 Difference]: Without dead ends: 323 [2021-10-24 11:09:15,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-24 11:09:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-10-24 11:09:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5186335403726707) internal successors, (489), 322 states have internal predecessors, (489), 0 states have call successors, (0), 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 11:09:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 489 transitions. [2021-10-24 11:09:15,053 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 489 transitions. Word has length 99 [2021-10-24 11:09:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:15,054 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 489 transitions. [2021-10-24 11:09:15,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 11:09:15,054 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 489 transitions. [2021-10-24 11:09:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-24 11:09:15,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:15,061 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:15,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 11:09:15,063 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:15,063 INFO L82 PathProgramCache]: Analyzing trace with hash 65854922, now seen corresponding path program 1 times [2021-10-24 11:09:15,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:15,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694419159] [2021-10-24 11:09:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:15,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 11:09:15,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:09:15,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694419159] [2021-10-24 11:09:15,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694419159] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:15,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:15,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:09:15,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579015852] [2021-10-24 11:09:15,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:09:15,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:09:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:15,161 INFO L87 Difference]: Start difference. First operand 323 states and 489 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 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 11:09:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:15,505 INFO L93 Difference]: Finished difference Result 805 states and 1197 transitions. [2021-10-24 11:09:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:09:15,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 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 102 [2021-10-24 11:09:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:15,507 INFO L225 Difference]: With dead ends: 805 [2021-10-24 11:09:15,508 INFO L226 Difference]: Without dead ends: 483 [2021-10-24 11:09:15,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-10-24 11:09:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2021-10-24 11:09:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.3672199170124482) internal successors, (659), 482 states have internal predecessors, (659), 0 states have call successors, (0), 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 11:09:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 659 transitions. [2021-10-24 11:09:15,520 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 659 transitions. Word has length 102 [2021-10-24 11:09:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:15,520 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 659 transitions. [2021-10-24 11:09:15,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 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 11:09:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 659 transitions. [2021-10-24 11:09:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-24 11:09:15,523 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:15,523 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:15,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 11:09:15,523 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:15,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1772722127, now seen corresponding path program 1 times [2021-10-24 11:09:15,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:15,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089308487] [2021-10-24 11:09:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:15,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 11:09:15,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:09:15,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089308487] [2021-10-24 11:09:15,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089308487] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:15,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:15,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:09:15,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838543167] [2021-10-24 11:09:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:09:15,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:09:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:15,575 INFO L87 Difference]: Start difference. First operand 483 states and 659 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 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 11:09:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:15,904 INFO L93 Difference]: Finished difference Result 1125 states and 1578 transitions. [2021-10-24 11:09:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:09:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 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) Word has length 107 [2021-10-24 11:09:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:15,909 INFO L225 Difference]: With dead ends: 1125 [2021-10-24 11:09:15,909 INFO L226 Difference]: Without dead ends: 723 [2021-10-24 11:09:15,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:09:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-10-24 11:09:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 723. [2021-10-24 11:09:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.2950138504155124) internal successors, (935), 722 states have internal predecessors, (935), 0 states have call successors, (0), 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 11:09:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 935 transitions. [2021-10-24 11:09:15,930 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 935 transitions. Word has length 107 [2021-10-24 11:09:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:15,931 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 935 transitions. [2021-10-24 11:09:15,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 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 11:09:15,931 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 935 transitions. [2021-10-24 11:09:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-24 11:09:15,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:15,934 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:15,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 11:09:15,934 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 91171940, now seen corresponding path program 1 times [2021-10-24 11:09:15,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:15,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6965849] [2021-10-24 11:09:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:15,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:16,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:09:16,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6965849] [2021-10-24 11:09:16,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6965849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 11:09:16,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124033976] [2021-10-24 11:09:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:16,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:09:16,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:16,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:09:16,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 11:09:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:16,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:09:16,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-24 11:09:16,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-24 11:09:16,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124033976] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:16,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:09:16,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-24 11:09:16,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646625288] [2021-10-24 11:09:16,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:09:16,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:09:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:09:16,826 INFO L87 Difference]: Start difference. First operand 723 states and 935 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 11:09:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:17,128 INFO L93 Difference]: Finished difference Result 1765 states and 2361 transitions. [2021-10-24 11:09:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:09:17,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 107 [2021-10-24 11:09:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:17,133 INFO L225 Difference]: With dead ends: 1765 [2021-10-24 11:09:17,133 INFO L226 Difference]: Without dead ends: 563 [2021-10-24 11:09:17,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:09:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-10-24 11:09:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 483. [2021-10-24 11:09:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.2800829875518671) internal successors, (617), 482 states have internal predecessors, (617), 0 states have call successors, (0), 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 11:09:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 617 transitions. [2021-10-24 11:09:17,152 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 617 transitions. Word has length 107 [2021-10-24 11:09:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:17,152 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 617 transitions. [2021-10-24 11:09:17,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 11:09:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 617 transitions. [2021-10-24 11:09:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-24 11:09:17,155 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:17,155 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:17,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-24 11:09:17,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-24 11:09:17,370 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:17,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:17,370 INFO L82 PathProgramCache]: Analyzing trace with hash -966260153, now seen corresponding path program 1 times [2021-10-24 11:09:17,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:09:17,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477094648] [2021-10-24 11:09:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:17,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:09:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:17,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:09:17,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477094648] [2021-10-24 11:09:17,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477094648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 11:09:17,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485543975] [2021-10-24 11:09:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:17,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:09:17,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:17,522 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:09:17,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 11:09:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 11:09:17,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-10-24 11:09:18,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-10-24 11:09:18,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485543975] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:18,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:09:18,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 5 [2021-10-24 11:09:18,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929266829] [2021-10-24 11:09:18,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:09:18,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:09:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:09:18,468 INFO L87 Difference]: Start difference. First operand 483 states and 617 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 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 11:09:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:18,602 INFO L93 Difference]: Finished difference Result 483 states and 617 transitions. [2021-10-24 11:09:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:09:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 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) Word has length 121 [2021-10-24 11:09:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:18,603 INFO L225 Difference]: With dead ends: 483 [2021-10-24 11:09:18,603 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 11:09:18,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:09:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 11:09:18,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 11:09:18,604 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 11:09:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 11:09:18,605 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2021-10-24 11:09:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:18,605 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 11:09:18,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 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 11:09:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 11:09:18,605 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 11:09:18,607 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:09:18,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:18,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-24 11:09:18,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 11:09:18,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:18,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:18,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:09:18,878 INFO L857 garLoopResultBuilder]: For program point L301(lines 301 423) no Hoare annotation was computed. [2021-10-24 11:09:18,878 INFO L857 garLoopResultBuilder]: For program point L235(lines 235 423) no Hoare annotation was computed. [2021-10-24 11:09:18,879 INFO L857 garLoopResultBuilder]: For program point L169(lines 169 423) no Hoare annotation was computed. [2021-10-24 11:09:18,879 INFO L857 garLoopResultBuilder]: For program point L303(lines 303 423) no Hoare annotation was computed. [2021-10-24 11:09:18,879 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 423) no Hoare annotation was computed. [2021-10-24 11:09:18,879 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 423) no Hoare annotation was computed. [2021-10-24 11:09:18,879 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 423) no Hoare annotation was computed. [2021-10-24 11:09:18,879 INFO L857 garLoopResultBuilder]: For program point L307(lines 307 423) no Hoare annotation was computed. [2021-10-24 11:09:18,880 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 423) no Hoare annotation was computed. [2021-10-24 11:09:18,880 INFO L857 garLoopResultBuilder]: For program point L109(lines 109 423) no Hoare annotation was computed. [2021-10-24 11:09:18,880 INFO L857 garLoopResultBuilder]: For program point L242(lines 242 423) no Hoare annotation was computed. [2021-10-24 11:09:18,880 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 423) no Hoare annotation was computed. [2021-10-24 11:09:18,880 INFO L857 garLoopResultBuilder]: For program point L574-1(lines 39 608) no Hoare annotation was computed. [2021-10-24 11:09:18,880 INFO L857 garLoopResultBuilder]: For program point L244(lines 244 423) no Hoare annotation was computed. [2021-10-24 11:09:18,880 INFO L857 garLoopResultBuilder]: For program point L179(lines 179 423) no Hoare annotation was computed. [2021-10-24 11:09:18,881 INFO L857 garLoopResultBuilder]: For program point L378(lines 378 423) no Hoare annotation was computed. [2021-10-24 11:09:18,881 INFO L857 garLoopResultBuilder]: For program point L48(lines 48 423) no Hoare annotation was computed. [2021-10-24 11:09:18,881 INFO L857 garLoopResultBuilder]: For program point L577-1(lines 39 608) no Hoare annotation was computed. [2021-10-24 11:09:18,881 INFO L857 garLoopResultBuilder]: For program point L247(lines 247 423) no Hoare annotation was computed. [2021-10-24 11:09:18,881 INFO L857 garLoopResultBuilder]: For program point L578(line 578) no Hoare annotation was computed. [2021-10-24 11:09:18,881 INFO L857 garLoopResultBuilder]: For program point L116(lines 116 423) no Hoare annotation was computed. [2021-10-24 11:09:18,882 INFO L857 garLoopResultBuilder]: For program point L52(lines 52 423) no Hoare annotation was computed. [2021-10-24 11:09:18,882 INFO L857 garLoopResultBuilder]: For program point L185(lines 185 423) no Hoare annotation was computed. [2021-10-24 11:09:18,882 INFO L857 garLoopResultBuilder]: For program point L385(lines 385 423) no Hoare annotation was computed. [2021-10-24 11:09:18,882 INFO L857 garLoopResultBuilder]: For program point L319(lines 319 423) no Hoare annotation was computed. [2021-10-24 11:09:18,882 INFO L857 garLoopResultBuilder]: For program point L189(lines 189 423) no Hoare annotation was computed. [2021-10-24 11:09:18,882 INFO L857 garLoopResultBuilder]: For program point L123(lines 123 423) no Hoare annotation was computed. [2021-10-24 11:09:18,883 INFO L857 garLoopResultBuilder]: For program point L57(lines 57 423) no Hoare annotation was computed. [2021-10-24 11:09:18,883 INFO L857 garLoopResultBuilder]: For program point L388(lines 388 423) no Hoare annotation was computed. [2021-10-24 11:09:18,883 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 11:09:18,883 INFO L857 garLoopResultBuilder]: For program point L390(lines 390 423) no Hoare annotation was computed. [2021-10-24 11:09:18,883 INFO L857 garLoopResultBuilder]: For program point L324(lines 324 423) no Hoare annotation was computed. [2021-10-24 11:09:18,883 INFO L857 garLoopResultBuilder]: For program point L258(lines 258 423) no Hoare annotation was computed. [2021-10-24 11:09:18,884 INFO L857 garLoopResultBuilder]: For program point L60(lines 60 423) no Hoare annotation was computed. [2021-10-24 11:09:18,884 INFO L857 garLoopResultBuilder]: For program point L195(lines 195 423) no Hoare annotation was computed. [2021-10-24 11:09:18,884 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 423) no Hoare annotation was computed. [2021-10-24 11:09:18,884 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 423) no Hoare annotation was computed. [2021-10-24 11:09:18,884 INFO L857 garLoopResultBuilder]: For program point L263(lines 263 423) no Hoare annotation was computed. [2021-10-24 11:09:18,884 INFO L857 garLoopResultBuilder]: For program point L197(lines 197 423) no Hoare annotation was computed. [2021-10-24 11:09:18,885 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 578) no Hoare annotation was computed. [2021-10-24 11:09:18,885 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 423) no Hoare annotation was computed. [2021-10-24 11:09:18,885 INFO L857 garLoopResultBuilder]: For program point L133(lines 133 423) no Hoare annotation was computed. [2021-10-24 11:09:18,885 INFO L857 garLoopResultBuilder]: For program point L399(lines 399 423) no Hoare annotation was computed. [2021-10-24 11:09:18,885 INFO L857 garLoopResultBuilder]: For program point L201(lines 201 423) no Hoare annotation was computed. [2021-10-24 11:09:18,885 INFO L857 garLoopResultBuilder]: For program point L69(lines 69 423) no Hoare annotation was computed. [2021-10-24 11:09:18,886 INFO L857 garLoopResultBuilder]: For program point L269(lines 269 423) no Hoare annotation was computed. [2021-10-24 11:09:18,886 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 423) no Hoare annotation was computed. [2021-10-24 11:09:18,886 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 423) no Hoare annotation was computed. [2021-10-24 11:09:18,886 INFO L857 garLoopResultBuilder]: For program point L404(lines 404 423) no Hoare annotation was computed. [2021-10-24 11:09:18,886 INFO L857 garLoopResultBuilder]: For program point L338(lines 338 423) no Hoare annotation was computed. [2021-10-24 11:09:18,886 INFO L857 garLoopResultBuilder]: For program point L140(lines 140 423) no Hoare annotation was computed. [2021-10-24 11:09:18,887 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 423) no Hoare annotation was computed. [2021-10-24 11:09:18,887 INFO L857 garLoopResultBuilder]: For program point L208(lines 208 423) no Hoare annotation was computed. [2021-10-24 11:09:18,887 INFO L857 garLoopResultBuilder]: For program point L341(lines 341 423) no Hoare annotation was computed. [2021-10-24 11:09:18,887 INFO L857 garLoopResultBuilder]: For program point L408(lines 408 423) no Hoare annotation was computed. [2021-10-24 11:09:18,887 INFO L857 garLoopResultBuilder]: For program point L144(lines 144 423) no Hoare annotation was computed. [2021-10-24 11:09:18,888 INFO L853 garLoopResultBuilder]: At program point L607(lines 39 608) the Hoare annotation is: (let ((.cse0 (<= ~a17~0 8))) (or (and (<= 8 ~a17~0) .cse0) (and (= ~a11~0 1) .cse0))) [2021-10-24 11:09:18,888 INFO L857 garLoopResultBuilder]: For program point L79(lines 79 423) no Hoare annotation was computed. [2021-10-24 11:09:18,888 INFO L857 garLoopResultBuilder]: For program point L212(lines 212 423) no Hoare annotation was computed. [2021-10-24 11:09:18,888 INFO L860 garLoopResultBuilder]: At program point L610(lines 610 627) the Hoare annotation is: true [2021-10-24 11:09:18,888 INFO L857 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-10-24 11:09:18,888 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 423) no Hoare annotation was computed. [2021-10-24 11:09:18,889 INFO L857 garLoopResultBuilder]: For program point L149(lines 149 423) no Hoare annotation was computed. [2021-10-24 11:09:18,889 INFO L857 garLoopResultBuilder]: For program point L414(lines 414 423) no Hoare annotation was computed. [2021-10-24 11:09:18,889 INFO L857 garLoopResultBuilder]: For program point L84(lines 84 423) no Hoare annotation was computed. [2021-10-24 11:09:18,889 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 11:09:18,889 INFO L857 garLoopResultBuilder]: For program point L417(lines 417 423) no Hoare annotation was computed. [2021-10-24 11:09:18,889 INFO L857 garLoopResultBuilder]: For program point L153(lines 153 423) no Hoare annotation was computed. [2021-10-24 11:09:18,890 INFO L853 garLoopResultBuilder]: At program point L616-2(lines 616 626) the Hoare annotation is: (let ((.cse0 (<= ~a17~0 8))) (or (and (<= 8 ~a17~0) .cse0) (and (= ~a11~0 1) .cse0))) [2021-10-24 11:09:18,890 INFO L857 garLoopResultBuilder]: For program point L286(lines 286 423) no Hoare annotation was computed. [2021-10-24 11:09:18,890 INFO L857 garLoopResultBuilder]: For program point L419(lines 419 423) no Hoare annotation was computed. [2021-10-24 11:09:18,890 INFO L857 garLoopResultBuilder]: For program point L222(lines 222 423) no Hoare annotation was computed. [2021-10-24 11:09:18,890 INFO L857 garLoopResultBuilder]: For program point L290(lines 290 423) no Hoare annotation was computed. [2021-10-24 11:09:18,890 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 423) no Hoare annotation was computed. [2021-10-24 11:09:18,891 INFO L857 garLoopResultBuilder]: For program point L92(lines 92 423) no Hoare annotation was computed. [2021-10-24 11:09:18,891 INFO L857 garLoopResultBuilder]: For program point L621(line 621) no Hoare annotation was computed. [2021-10-24 11:09:18,891 INFO L857 garLoopResultBuilder]: For program point L225(lines 225 423) no Hoare annotation was computed. [2021-10-24 11:09:18,891 INFO L857 garLoopResultBuilder]: For program point L359(lines 359 423) no Hoare annotation was computed. [2021-10-24 11:09:18,891 INFO L857 garLoopResultBuilder]: For program point L293(lines 293 423) no Hoare annotation was computed. [2021-10-24 11:09:18,891 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 423) no Hoare annotation was computed. [2021-10-24 11:09:18,892 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 423) no Hoare annotation was computed. [2021-10-24 11:09:18,892 INFO L857 garLoopResultBuilder]: For program point L164(lines 164 423) no Hoare annotation was computed. [2021-10-24 11:09:18,892 INFO L857 garLoopResultBuilder]: For program point L364(lines 364 423) no Hoare annotation was computed. [2021-10-24 11:09:18,892 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 423) no Hoare annotation was computed. [2021-10-24 11:09:18,892 INFO L857 garLoopResultBuilder]: For program point L101(lines 101 423) no Hoare annotation was computed. [2021-10-24 11:09:18,897 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:09:18,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:09:18 BoogieIcfgContainer [2021-10-24 11:09:18,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:09:18,910 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:09:18,911 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:09:18,911 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:09:18,911 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:13" (3/4) ... [2021-10-24 11:09:18,914 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 11:09:18,935 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 114 nodes and edges [2021-10-24 11:09:18,937 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-24 11:09:18,939 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-24 11:09:18,940 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 11:09:19,086 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:09:19,086 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:09:19,088 INFO L168 Benchmark]: Toolchain (without parser) took 8769.68 ms. Allocated memory was 100.7 MB in the beginning and 176.2 MB in the end (delta: 75.5 MB). Free memory was 63.4 MB in the beginning and 135.1 MB in the end (delta: -71.7 MB). Peak memory consumption was 92.7 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:19,088 INFO L168 Benchmark]: CDTParser took 0.94 ms. Allocated memory is still 100.7 MB. Free memory was 74.2 MB in the beginning and 74.2 MB in the end (delta: 28.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:09:19,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 652.15 ms. Allocated memory is still 100.7 MB. Free memory was 63.2 MB in the beginning and 59.7 MB in the end (delta: 3.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:19,089 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.46 ms. Allocated memory is still 100.7 MB. Free memory was 59.7 MB in the beginning and 54.6 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:19,090 INFO L168 Benchmark]: Boogie Preprocessor took 85.74 ms. Allocated memory is still 100.7 MB. Free memory was 54.6 MB in the beginning and 50.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:19,090 INFO L168 Benchmark]: RCFGBuilder took 1947.30 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 50.4 MB in the beginning and 97.8 MB in the end (delta: -47.4 MB). Peak memory consumption was 55.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:19,091 INFO L168 Benchmark]: TraceAbstraction took 5804.60 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 97.8 MB in the beginning and 54.9 MB in the end (delta: 42.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:19,091 INFO L168 Benchmark]: Witness Printer took 175.85 ms. Allocated memory is still 176.2 MB. Free memory was 54.9 MB in the beginning and 135.1 MB in the end (delta: -80.2 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:19,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.94 ms. Allocated memory is still 100.7 MB. Free memory was 74.2 MB in the beginning and 74.2 MB in the end (delta: 28.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 652.15 ms. Allocated memory is still 100.7 MB. Free memory was 63.2 MB in the beginning and 59.7 MB in the end (delta: 3.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 96.46 ms. Allocated memory is still 100.7 MB. Free memory was 59.7 MB in the beginning and 54.6 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 85.74 ms. Allocated memory is still 100.7 MB. Free memory was 54.6 MB in the beginning and 50.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1947.30 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 50.4 MB in the beginning and 97.8 MB in the end (delta: -47.4 MB). Peak memory consumption was 55.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5804.60 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 97.8 MB in the beginning and 54.9 MB in the end (delta: 42.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 16.1 GB. * Witness Printer took 175.85 ms. Allocated memory is still 176.2 MB. Free memory was 54.9 MB in the beginning and 135.1 MB in the end (delta: -80.2 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 578]: 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 CFG has 1 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5722.1ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 45.4ms, AutomataDifference: 2145.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 59.8ms, InitialAbstractionConstructionTime: 13.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 420 SDtfs, 442 SDslu, 31 SDs, 0 SdLazy, 1356 SolverSat, 322 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1474.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 471 GetRequests, 457 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=723occurred in iteration=5, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 149.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 82 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 31 NumberOfFragments, 31 HoareAnnotationTreeSize, 3 FomulaSimplifications, 348 FormulaSimplificationTreeSizeReduction, 30.1ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 23.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 92.8ms SsaConstructionTime, 380.2ms SatisfiabilityAnalysisTime, 2007.5ms InterpolantComputationTime, 942 NumberOfCodeBlocks, 942 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 4315 SizeOfPredicates, 0 NumberOfNonLiveVariables, 608 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 11 InterpolantComputations, 9 PerfectInterpolantSequences, 318/342 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 - InvariantResult [Line: 616]: Loop Invariant Derived loop invariant: (8 <= a17 && a17 <= 8) || (a11 == 1 && a17 <= 8) - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (8 <= a17 && a17 <= 8) || (a11 == 1 && a17 <= 8) RESULT: Ultimate proved your program to be correct! [2021-10-24 11:09:19,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c24ec97-7024-45a2-a98a-7a0eb184fee5/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...