./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/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_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/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_2b90799c-832c-443f-906f-5c27d37a7153/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 188684281000582d59335a47c0dc5eab5f2247c6b874067ba9fcabecac4c6ca6 ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/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_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/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 188684281000582d59335a47c0dc5eab5f2247c6b874067ba9fcabecac4c6ca6 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:09:33,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:09:33,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:09:34,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:09:34,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:09:34,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:09:34,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:09:34,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:09:34,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:09:34,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:09:34,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:09:34,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:09:34,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:09:34,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:09:34,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:09:34,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:09:34,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:09:34,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:09:34,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:09:34,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:09:34,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:09:34,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:09:34,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:09:34,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:09:34,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:09:34,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:09:34,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:09:34,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:09:34,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:09:34,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:09:34,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:09:34,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:09:34,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:09:34,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:09:34,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:09:34,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:09:34,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:09:34,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:09:34,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:09:34,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:09:34,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:09:34,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:09:34,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:09:34,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:09:34,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:09:34,180 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:09:34,180 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:09:34,181 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:09:34,181 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:09:34,181 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:09:34,181 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:09:34,181 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:09:34,186 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:09:34,186 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:09:34,186 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:09:34,187 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:09:34,187 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:09:34,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:09:34,188 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:09:34,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:09:34,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:09:34,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:09:34,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:09:34,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:09:34,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:09:34,190 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:09:34,190 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:09:34,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:09:34,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:09:34,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:09:34,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:09:34,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:09:34,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:34,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:09:34,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:09:34,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:09:34,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:09:34,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:09:34,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:09:34,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:09:34,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:09:34,195 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_2b90799c-832c-443f-906f-5c27d37a7153/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 188684281000582d59335a47c0dc5eab5f2247c6b874067ba9fcabecac4c6ca6 [2021-10-24 11:09:34,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:09:34,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:09:34,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:09:34,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:09:34,507 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:09:34,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2021-10-24 11:09:34,586 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data/3e62d4aed/714a67b322a340b9b4466a6d44b171fc/FLAG20c41eb86 [2021-10-24 11:09:35,046 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:09:35,047 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2021-10-24 11:09:35,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data/3e62d4aed/714a67b322a340b9b4466a6d44b171fc/FLAG20c41eb86 [2021-10-24 11:09:35,443 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data/3e62d4aed/714a67b322a340b9b4466a6d44b171fc [2021-10-24 11:09:35,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:09:35,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:09:35,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:35,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:09:35,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:09:35,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:35" (1/1) ... [2021-10-24 11:09:35,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e949a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:35, skipping insertion in model container [2021-10-24 11:09:35,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:35" (1/1) ... [2021-10-24 11:09:35,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:09:35,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:09:35,685 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_2b90799c-832c-443f-906f-5c27d37a7153/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2663,2676] [2021-10-24 11:09:35,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:35,712 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-10-24 11:09:35,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@306a2a1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:35, skipping insertion in model container [2021-10-24 11:09:35,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:35,713 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 11:09:35,715 INFO L168 Benchmark]: Toolchain (without parser) took 266.79 ms. Allocated memory is still 115.3 MB. Free memory was 73.1 MB in the beginning and 89.1 MB in the end (delta: -16.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:35,716 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 115.3 MB. Free memory is still 89.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:09:35,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.39 ms. Allocated memory is still 115.3 MB. Free memory was 72.9 MB in the beginning and 89.1 MB in the end (delta: -16.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:35,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 115.3 MB. Free memory is still 89.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 260.39 ms. Allocated memory is still 115.3 MB. Free memory was 72.9 MB in the beginning and 89.1 MB in the end (delta: -16.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:09:38,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:09:38,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:09:38,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:09:38,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:09:38,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:09:38,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:09:38,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:09:38,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:09:38,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:09:38,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:09:38,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:09:38,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:09:38,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:09:38,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:09:38,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:09:38,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:09:38,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:09:38,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:09:38,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:09:38,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:09:38,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:09:38,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:09:38,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:09:38,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:09:38,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:09:38,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:09:38,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:09:38,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:09:38,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:09:38,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:09:38,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:09:38,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:09:38,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:09:38,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:09:38,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:09:38,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:09:38,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:09:38,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:09:38,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:09:38,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:09:38,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 11:09:38,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:09:38,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:09:38,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:09:38,320 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:09:38,320 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:09:38,321 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:09:38,321 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:09:38,321 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:09:38,321 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:09:38,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:09:38,324 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:09:38,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:09:38,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:09:38,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:09:38,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:09:38,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:09:38,325 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:09:38,326 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 11:09:38,326 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 11:09:38,326 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:09:38,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:09:38,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:09:38,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:09:38,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:09:38,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 11:09:38,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:09:38,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:38,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:09:38,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:09:38,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:09:38,329 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 11:09:38,329 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 11:09:38,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:09:38,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:09:38,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:09:38,330 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 188684281000582d59335a47c0dc5eab5f2247c6b874067ba9fcabecac4c6ca6 [2021-10-24 11:09:38,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:09:38,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:09:38,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:09:38,755 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:09:38,756 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:09:38,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2021-10-24 11:09:38,834 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data/4a1d8665e/df3ff4e085b9456db7bd7bba444c7cbf/FLAG62c38a6a2 [2021-10-24 11:09:39,416 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:09:39,417 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2021-10-24 11:09:39,428 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data/4a1d8665e/df3ff4e085b9456db7bd7bba444c7cbf/FLAG62c38a6a2 [2021-10-24 11:09:39,722 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/data/4a1d8665e/df3ff4e085b9456db7bd7bba444c7cbf [2021-10-24 11:09:39,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:09:39,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:09:39,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:39,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:09:39,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:09:39,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:39" (1/1) ... [2021-10-24 11:09:39,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8613084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:39, skipping insertion in model container [2021-10-24 11:09:39,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:39" (1/1) ... [2021-10-24 11:09:39,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:09:39,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:09:39,941 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_2b90799c-832c-443f-906f-5c27d37a7153/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2663,2676] [2021-10-24 11:09:39,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:39,966 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 11:09:39,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:09:40,020 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_2b90799c-832c-443f-906f-5c27d37a7153/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2663,2676] [2021-10-24 11:09:40,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:40,052 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:09:40,102 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_2b90799c-832c-443f-906f-5c27d37a7153/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2663,2676] [2021-10-24 11:09:40,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:40,140 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:09:40,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40 WrapperNode [2021-10-24 11:09:40,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:40,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:09:40,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:09:40,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:09:40,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:09:40,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:09:40,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:09:40,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:09:40,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:09:40,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:09:40,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:09:40,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:09:40,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (1/1) ... [2021-10-24 11:09:40,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:40,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:40,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:09:40,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:09:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 11:09:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:09:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 11:09:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-24 11:09:40,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-24 11:09:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-24 11:09:40,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-24 11:09:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-24 11:09:40,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-24 11:09:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-24 11:09:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-24 11:09:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 11:09:40,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:09:40,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:09:40,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 11:09:40,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 11:09:40,332 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-24 11:09:41,492 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:09:41,492 INFO L299 CfgBuilder]: Removed 44 assume(true) statements. [2021-10-24 11:09:41,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:41 BoogieIcfgContainer [2021-10-24 11:09:41,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:09:41,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:09:41,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:09:41,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:09:41,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:09:39" (1/3) ... [2021-10-24 11:09:41,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250a09b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:09:41, skipping insertion in model container [2021-10-24 11:09:41,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:40" (2/3) ... [2021-10-24 11:09:41,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250a09b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:09:41, skipping insertion in model container [2021-10-24 11:09:41,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:41" (3/3) ... [2021-10-24 11:09:41,504 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2021-10-24 11:09:41,509 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-24 11:09:41,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:09:41,510 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 11:09:41,510 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-24 11:09:41,549 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,550 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,550 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,550 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,550 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,551 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,551 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,551 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,551 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,552 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,552 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,555 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,555 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,556 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,556 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,557 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,557 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,557 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,557 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,559 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,560 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,576 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,577 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,577 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,578 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,578 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,581 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,584 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,584 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,585 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,585 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,585 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,586 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,586 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,586 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,587 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,587 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,587 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,587 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,588 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,588 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,588 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,588 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,589 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,590 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,593 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,593 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,594 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,594 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,594 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,595 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,595 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,596 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,596 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,602 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,602 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,602 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,604 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,604 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,605 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,605 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,606 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,606 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,606 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,607 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,607 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,607 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,607 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,608 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,609 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,609 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,609 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,609 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,610 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,610 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,610 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,610 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,611 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,611 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,611 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,611 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,612 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,612 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,612 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,612 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,613 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,613 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,613 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,613 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,614 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,614 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,614 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,614 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,614 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,615 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,615 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,615 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,615 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,616 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,616 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,616 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,616 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,620 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,620 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,621 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,621 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,622 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,622 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,626 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,627 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,627 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,627 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,627 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,628 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,628 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,628 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,630 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,631 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,631 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,631 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,632 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,632 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,632 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,632 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,632 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,633 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,633 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,633 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,633 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,634 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:41,643 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-24 11:09:41,702 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:09:41,708 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 11:09:41,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-24 11:09:41,733 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-24 11:09:41,749 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 257 transitions, 538 flow [2021-10-24 11:09:41,757 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 257 transitions, 538 flow [2021-10-24 11:09:41,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 257 transitions, 538 flow [2021-10-24 11:09:41,935 INFO L129 PetriNetUnfolder]: 26/254 cut-off events. [2021-10-24 11:09:41,937 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-24 11:09:41,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 254 events. 26/254 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 218 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 210. Up to 3 conditions per place. [2021-10-24 11:09:41,959 INFO L116 LiptonReduction]: Number of co-enabled transitions 3162 [2021-10-24 11:10:36,513 INFO L131 LiptonReduction]: Checked pairs total: 5729 [2021-10-24 11:10:36,514 INFO L133 LiptonReduction]: Total number of compositions: 271 [2021-10-24 11:10:36,530 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 41 transitions, 106 flow [2021-10-24 11:10:36,576 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 313 states, 312 states have (on average 3.676282051282051) internal successors, (1147), 312 states have internal predecessors, (1147), 0 states have call successors, (0), 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 11:10:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 312 states have (on average 3.676282051282051) internal successors, (1147), 312 states have internal predecessors, (1147), 0 states have call successors, (0), 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 11:10:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:36,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:36,599 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] [2021-10-24 11:10:36,599 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash 401556214, now seen corresponding path program 1 times [2021-10-24 11:10:36,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:36,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101391846] [2021-10-24 11:10:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:36,619 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:36,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:36,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:36,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 11:10:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:36,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:36,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:36,988 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 11:10:36,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:37,120 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 11:10:37,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:37,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101391846] [2021-10-24 11:10:37,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101391846] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:37,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:37,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-10-24 11:10:37,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044832810] [2021-10-24 11:10:37,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:10:37,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:37,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:10:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:10:37,167 INFO L87 Difference]: Start difference. First operand has 313 states, 312 states have (on average 3.676282051282051) internal successors, (1147), 312 states have internal predecessors, (1147), 0 states have call successors, (0), 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 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:10:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:38,167 INFO L93 Difference]: Finished difference Result 314 states and 1148 transitions. [2021-10-24 11:10:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:10:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 22 [2021-10-24 11:10:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:38,188 INFO L225 Difference]: With dead ends: 314 [2021-10-24 11:10:38,188 INFO L226 Difference]: Without dead ends: 314 [2021-10-24 11:10:38,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:10:38,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-10-24 11:10:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2021-10-24 11:10:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.6677316293929714) internal successors, (1148), 313 states have internal predecessors, (1148), 0 states have call successors, (0), 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 11:10:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1148 transitions. [2021-10-24 11:10:38,286 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1148 transitions. Word has length 22 [2021-10-24 11:10:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:38,297 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1148 transitions. [2021-10-24 11:10:38,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:10:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1148 transitions. [2021-10-24 11:10:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-24 11:10:38,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:38,303 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] [2021-10-24 11:10:38,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:38,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:38,531 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:38,531 INFO L82 PathProgramCache]: Analyzing trace with hash 803731460, now seen corresponding path program 1 times [2021-10-24 11:10:38,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:38,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558419781] [2021-10-24 11:10:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:38,532 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:38,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:38,533 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:38,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 11:10:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:38,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:10:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:38,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:39,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:39,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558419781] [2021-10-24 11:10:39,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558419781] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:39,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:39,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 7 [2021-10-24 11:10:39,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702188057] [2021-10-24 11:10:39,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 11:10:39,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 11:10:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:10:39,028 INFO L87 Difference]: Start difference. First operand 314 states and 1148 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 11:10:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:39,933 INFO L93 Difference]: Finished difference Result 316 states and 1150 transitions. [2021-10-24 11:10:39,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:10:39,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2021-10-24 11:10:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:39,942 INFO L225 Difference]: With dead ends: 316 [2021-10-24 11:10:39,943 INFO L226 Difference]: Without dead ends: 316 [2021-10-24 11:10:39,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:10:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-24 11:10:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-10-24 11:10:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.6507936507936507) internal successors, (1150), 315 states have internal predecessors, (1150), 0 states have call successors, (0), 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 11:10:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1150 transitions. [2021-10-24 11:10:39,988 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1150 transitions. Word has length 23 [2021-10-24 11:10:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:39,989 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 1150 transitions. [2021-10-24 11:10:39,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 11:10:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1150 transitions. [2021-10-24 11:10:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-24 11:10:39,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:39,994 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] [2021-10-24 11:10:40,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-24 11:10:40,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:40,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:40,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2020941283, now seen corresponding path program 1 times [2021-10-24 11:10:40,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:40,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645042088] [2021-10-24 11:10:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:40,208 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:40,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:40,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 11:10:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:40,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:10:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:41,339 INFO L354 Elim1Store]: treesize reduction 156, result has 58.2 percent of original size [2021-10-24 11:10:41,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 126 treesize of output 252 [2021-10-24 11:10:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:42,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:42,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:42,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645042088] [2021-10-24 11:10:42,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645042088] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:42,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:42,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-24 11:10:42,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746334595] [2021-10-24 11:10:42,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:10:42,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:10:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:10:42,816 INFO L87 Difference]: Start difference. First operand 316 states and 1150 transitions. Second operand has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 11:10:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:43,068 INFO L93 Difference]: Finished difference Result 609 states and 2245 transitions. [2021-10-24 11:10:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:10:43,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 25 [2021-10-24 11:10:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:43,080 INFO L225 Difference]: With dead ends: 609 [2021-10-24 11:10:43,080 INFO L226 Difference]: Without dead ends: 594 [2021-10-24 11:10:43,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:10:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-10-24 11:10:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 416. [2021-10-24 11:10:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.744578313253012) internal successors, (1554), 415 states have internal predecessors, (1554), 0 states have call successors, (0), 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 11:10:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1554 transitions. [2021-10-24 11:10:43,132 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1554 transitions. Word has length 25 [2021-10-24 11:10:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:43,133 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1554 transitions. [2021-10-24 11:10:43,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 11:10:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1554 transitions. [2021-10-24 11:10:43,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:10:43,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:43,139 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] [2021-10-24 11:10:43,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:43,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:43,355 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:43,355 INFO L82 PathProgramCache]: Analyzing trace with hash -844980366, now seen corresponding path program 1 times [2021-10-24 11:10:43,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:43,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772893228] [2021-10-24 11:10:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:43,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:43,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:43,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:43,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 11:10:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:43,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:10:43,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:43,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:43,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:43,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772893228] [2021-10-24 11:10:43,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772893228] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:43,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:43,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 11:10:43,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302978432] [2021-10-24 11:10:43,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:10:43,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:10:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:10:43,820 INFO L87 Difference]: Start difference. First operand 416 states and 1554 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 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 11:10:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:44,661 INFO L93 Difference]: Finished difference Result 640 states and 2267 transitions. [2021-10-24 11:10:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:10:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:10:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:44,670 INFO L225 Difference]: With dead ends: 640 [2021-10-24 11:10:44,670 INFO L226 Difference]: Without dead ends: 620 [2021-10-24 11:10:44,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:10:44,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-10-24 11:10:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 494. [2021-10-24 11:10:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.665314401622718) internal successors, (1807), 493 states have internal predecessors, (1807), 0 states have call successors, (0), 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 11:10:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1807 transitions. [2021-10-24 11:10:44,707 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1807 transitions. Word has length 28 [2021-10-24 11:10:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:44,708 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1807 transitions. [2021-10-24 11:10:44,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 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 11:10:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1807 transitions. [2021-10-24 11:10:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:10:44,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:44,711 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] [2021-10-24 11:10:44,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:44,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:44,925 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash 972025783, now seen corresponding path program 1 times [2021-10-24 11:10:44,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:44,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737067044] [2021-10-24 11:10:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:44,927 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:44,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:44,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:44,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 11:10:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:45,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:45,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:45,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:45,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737067044] [2021-10-24 11:10:45,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737067044] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:45,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:45,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:10:45,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180730001] [2021-10-24 11:10:45,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:10:45,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:45,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:10:45,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:10:45,679 INFO L87 Difference]: Start difference. First operand 494 states and 1807 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:10:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:47,782 INFO L93 Difference]: Finished difference Result 1150 states and 4246 transitions. [2021-10-24 11:10:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:10:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:10:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:47,795 INFO L225 Difference]: With dead ends: 1150 [2021-10-24 11:10:47,796 INFO L226 Difference]: Without dead ends: 1120 [2021-10-24 11:10:47,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-10-24 11:10:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-10-24 11:10:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 620. [2021-10-24 11:10:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.6623586429725363) internal successors, (2267), 619 states have internal predecessors, (2267), 0 states have call successors, (0), 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 11:10:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2267 transitions. [2021-10-24 11:10:47,867 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2267 transitions. Word has length 28 [2021-10-24 11:10:47,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:47,868 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2267 transitions. [2021-10-24 11:10:47,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:10:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2267 transitions. [2021-10-24 11:10:47,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:10:47,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:47,873 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] [2021-10-24 11:10:47,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:48,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:48,083 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:48,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1538228687, now seen corresponding path program 2 times [2021-10-24 11:10:48,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:48,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173655846] [2021-10-24 11:10:48,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:10:48,084 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:48,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:48,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 11:10:48,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:48,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:48,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:48,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:48,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173655846] [2021-10-24 11:10:48,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173655846] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:48,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:48,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:10:48,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841571899] [2021-10-24 11:10:48,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:10:48,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:48,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:10:48,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:10:48,898 INFO L87 Difference]: Start difference. First operand 620 states and 2267 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 11:10:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:51,553 INFO L93 Difference]: Finished difference Result 1662 states and 6484 transitions. [2021-10-24 11:10:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:10:51,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:10:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:51,577 INFO L225 Difference]: With dead ends: 1662 [2021-10-24 11:10:51,577 INFO L226 Difference]: Without dead ends: 1612 [2021-10-24 11:10:51,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:10:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-10-24 11:10:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 872. [2021-10-24 11:10:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.970149253731343) internal successors, (3458), 871 states have internal predecessors, (3458), 0 states have call successors, (0), 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 11:10:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 3458 transitions. [2021-10-24 11:10:51,678 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 3458 transitions. Word has length 28 [2021-10-24 11:10:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:51,679 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 3458 transitions. [2021-10-24 11:10:51,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 11:10:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 3458 transitions. [2021-10-24 11:10:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:10:51,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:51,686 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] [2021-10-24 11:10:51,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:51,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:51,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:51,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1537709877, now seen corresponding path program 3 times [2021-10-24 11:10:51,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:51,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244114939] [2021-10-24 11:10:51,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:10:51,903 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:51,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:51,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 11:10:52,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:10:52,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:52,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:52,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:52,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:52,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244114939] [2021-10-24 11:10:52,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244114939] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:52,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:52,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:10:52,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369264578] [2021-10-24 11:10:52,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:10:52,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:10:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:10:52,736 INFO L87 Difference]: Start difference. First operand 872 states and 3458 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:10:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:54,152 INFO L93 Difference]: Finished difference Result 1620 states and 6061 transitions. [2021-10-24 11:10:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:10:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:10:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:54,172 INFO L225 Difference]: With dead ends: 1620 [2021-10-24 11:10:54,173 INFO L226 Difference]: Without dead ends: 1620 [2021-10-24 11:10:54,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:10:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-10-24 11:10:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 974. [2021-10-24 11:10:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 3.935251798561151) internal successors, (3829), 973 states have internal predecessors, (3829), 0 states have call successors, (0), 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 11:10:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 3829 transitions. [2021-10-24 11:10:54,243 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 3829 transitions. Word has length 28 [2021-10-24 11:10:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:54,243 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 3829 transitions. [2021-10-24 11:10:54,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:10:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 3829 transitions. [2021-10-24 11:10:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:10:54,247 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:54,248 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] [2021-10-24 11:10:54,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:54,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:54,461 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1818244819, now seen corresponding path program 4 times [2021-10-24 11:10:54,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:54,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22562672] [2021-10-24 11:10:54,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:10:54,463 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:54,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:54,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:54,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 11:10:54,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:10:54,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:55,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:55,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:55,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22562672] [2021-10-24 11:10:55,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22562672] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:55,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:55,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:10:55,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915633988] [2021-10-24 11:10:55,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:10:55,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:10:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:10:55,285 INFO L87 Difference]: Start difference. First operand 974 states and 3829 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:10:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:56,780 INFO L93 Difference]: Finished difference Result 1152 states and 4381 transitions. [2021-10-24 11:10:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 11:10:56,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:10:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:56,793 INFO L225 Difference]: With dead ends: 1152 [2021-10-24 11:10:56,793 INFO L226 Difference]: Without dead ends: 1152 [2021-10-24 11:10:56,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:10:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-10-24 11:10:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 880. [2021-10-24 11:10:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.9180887372013653) internal successors, (3444), 879 states have internal predecessors, (3444), 0 states have call successors, (0), 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 11:10:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3444 transitions. [2021-10-24 11:10:56,856 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3444 transitions. Word has length 28 [2021-10-24 11:10:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:56,857 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 3444 transitions. [2021-10-24 11:10:56,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:10:56,857 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3444 transitions. [2021-10-24 11:10:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:10:56,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:56,864 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] [2021-10-24 11:10:56,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:57,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:57,078 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:57,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:57,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1167313669, now seen corresponding path program 5 times [2021-10-24 11:10:57,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:57,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656778754] [2021-10-24 11:10:57,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:10:57,080 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:57,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:57,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:57,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 11:10:57,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:57,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:57,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:57,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:10:57,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:57,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656778754] [2021-10-24 11:10:57,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656778754] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:57,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:57,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:10:57,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113498305] [2021-10-24 11:10:57,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:10:57,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:10:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:10:57,847 INFO L87 Difference]: Start difference. First operand 880 states and 3444 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:11:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:00,285 INFO L93 Difference]: Finished difference Result 1958 states and 7543 transitions. [2021-10-24 11:11:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:11:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:11:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:00,304 INFO L225 Difference]: With dead ends: 1958 [2021-10-24 11:11:00,305 INFO L226 Difference]: Without dead ends: 1864 [2021-10-24 11:11:00,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:11:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-10-24 11:11:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 848. [2021-10-24 11:11:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.689492325855962) internal successors, (3125), 847 states have internal predecessors, (3125), 0 states have call successors, (0), 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 11:11:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 3125 transitions. [2021-10-24 11:11:00,364 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 3125 transitions. Word has length 28 [2021-10-24 11:11:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:00,364 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 3125 transitions. [2021-10-24 11:11:00,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:11:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 3125 transitions. [2021-10-24 11:11:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:11:00,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:00,368 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] [2021-10-24 11:11:00,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:00,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:00,587 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:00,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:00,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2130325855, now seen corresponding path program 6 times [2021-10-24 11:11:00,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:00,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123485143] [2021-10-24 11:11:00,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 11:11:00,588 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:00,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:00,590 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:00,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 11:11:00,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 11:11:00,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:00,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:11:00,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:01,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:01,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:01,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123485143] [2021-10-24 11:11:01,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123485143] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:11:01,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:11:01,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:11:01,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836266589] [2021-10-24 11:11:01,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:11:01,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:11:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:11:01,299 INFO L87 Difference]: Start difference. First operand 848 states and 3125 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 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 11:11:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:02,383 INFO L93 Difference]: Finished difference Result 940 states and 3370 transitions. [2021-10-24 11:11:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 11:11:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:11:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:02,392 INFO L225 Difference]: With dead ends: 940 [2021-10-24 11:11:02,392 INFO L226 Difference]: Without dead ends: 924 [2021-10-24 11:11:02,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:11:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-10-24 11:11:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 844. [2021-10-24 11:11:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.6892052194543297) internal successors, (3110), 843 states have internal predecessors, (3110), 0 states have call successors, (0), 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 11:11:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 3110 transitions. [2021-10-24 11:11:02,428 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 3110 transitions. Word has length 28 [2021-10-24 11:11:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:02,428 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 3110 transitions. [2021-10-24 11:11:02,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 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 11:11:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 3110 transitions. [2021-10-24 11:11:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:11:02,432 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:02,432 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] [2021-10-24 11:11:02,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:02,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:02,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:02,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1369706567, now seen corresponding path program 7 times [2021-10-24 11:11:02,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:02,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661303999] [2021-10-24 11:11:02,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 11:11:02,648 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:02,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:02,649 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:02,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-24 11:11:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:11:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:03,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:03,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:03,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661303999] [2021-10-24 11:11:03,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661303999] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:11:03,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:11:03,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:11:03,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395735428] [2021-10-24 11:11:03,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:11:03,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:03,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:11:03,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:11:03,318 INFO L87 Difference]: Start difference. First operand 844 states and 3110 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 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 11:11:04,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:04,879 INFO L93 Difference]: Finished difference Result 1048 states and 3732 transitions. [2021-10-24 11:11:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 11:11:04,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:11:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:04,891 INFO L225 Difference]: With dead ends: 1048 [2021-10-24 11:11:04,891 INFO L226 Difference]: Without dead ends: 1036 [2021-10-24 11:11:04,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-24 11:11:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-10-24 11:11:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 862. [2021-10-24 11:11:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.7026713124274098) internal successors, (3188), 861 states have internal predecessors, (3188), 0 states have call successors, (0), 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 11:11:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3188 transitions. [2021-10-24 11:11:04,939 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3188 transitions. Word has length 28 [2021-10-24 11:11:04,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:04,940 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 3188 transitions. [2021-10-24 11:11:04,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 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 11:11:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3188 transitions. [2021-10-24 11:11:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:11:04,945 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:04,945 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] [2021-10-24 11:11:04,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:05,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:05,160 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash -293498077, now seen corresponding path program 8 times [2021-10-24 11:11:05,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:05,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480031819] [2021-10-24 11:11:05,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:11:05,161 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:05,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:05,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:05,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-24 11:11:05,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:11:05,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:05,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:11:05,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:05,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:05,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:05,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480031819] [2021-10-24 11:11:05,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480031819] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:11:05,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:11:05,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-24 11:11:05,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146043103] [2021-10-24 11:11:05,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:11:05,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:05,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:11:05,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:11:05,985 INFO L87 Difference]: Start difference. First operand 862 states and 3188 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 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 11:11:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:07,080 INFO L93 Difference]: Finished difference Result 1084 states and 3950 transitions. [2021-10-24 11:11:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:11:07,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:11:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:07,093 INFO L225 Difference]: With dead ends: 1084 [2021-10-24 11:11:07,093 INFO L226 Difference]: Without dead ends: 1010 [2021-10-24 11:11:07,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:11:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-10-24 11:11:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 594. [2021-10-24 11:11:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.688026981450253) internal successors, (2187), 593 states have internal predecessors, (2187), 0 states have call successors, (0), 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 11:11:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 2187 transitions. [2021-10-24 11:11:07,125 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 2187 transitions. Word has length 28 [2021-10-24 11:11:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:07,127 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 2187 transitions. [2021-10-24 11:11:07,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 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 11:11:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 2187 transitions. [2021-10-24 11:11:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:11:07,130 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:07,130 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] [2021-10-24 11:11:07,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:07,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:07,349 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:07,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:07,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1598494755, now seen corresponding path program 9 times [2021-10-24 11:11:07,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:07,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638659388] [2021-10-24 11:11:07,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:11:07,350 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:07,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:07,350 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:07,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-24 11:11:07,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:11:07,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:11:07,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:07,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:08,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:08,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638659388] [2021-10-24 11:11:08,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638659388] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:11:08,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:11:08,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:11:08,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711460496] [2021-10-24 11:11:08,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:11:08,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:11:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:11:08,083 INFO L87 Difference]: Start difference. First operand 594 states and 2187 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 11:11:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:10,035 INFO L93 Difference]: Finished difference Result 844 states and 3127 transitions. [2021-10-24 11:11:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 11:11:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:11:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:10,044 INFO L225 Difference]: With dead ends: 844 [2021-10-24 11:11:10,044 INFO L226 Difference]: Without dead ends: 826 [2021-10-24 11:11:10,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:11:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-10-24 11:11:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 594. [2021-10-24 11:11:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.6913996627318717) internal successors, (2189), 593 states have internal predecessors, (2189), 0 states have call successors, (0), 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 11:11:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 2189 transitions. [2021-10-24 11:11:10,069 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 2189 transitions. Word has length 28 [2021-10-24 11:11:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:10,069 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 2189 transitions. [2021-10-24 11:11:10,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 11:11:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 2189 transitions. [2021-10-24 11:11:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:11:10,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:10,072 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] [2021-10-24 11:11:10,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:10,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:10,287 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:10,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1211383215, now seen corresponding path program 10 times [2021-10-24 11:11:10,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:10,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669659179] [2021-10-24 11:11:10,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:11:10,288 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:10,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:10,289 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:10,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-24 11:11:10,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:11:10,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:10,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:11:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:10,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:10,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:10,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669659179] [2021-10-24 11:11:10,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669659179] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:11:10,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:11:10,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:11:10,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904229680] [2021-10-24 11:11:10,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:11:10,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:10,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:11:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:11:10,965 INFO L87 Difference]: Start difference. First operand 594 states and 2189 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 11:11:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:12,939 INFO L93 Difference]: Finished difference Result 1302 states and 4861 transitions. [2021-10-24 11:11:12,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:11:12,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:11:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:12,955 INFO L225 Difference]: With dead ends: 1302 [2021-10-24 11:11:12,956 INFO L226 Difference]: Without dead ends: 1278 [2021-10-24 11:11:12,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:11:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-10-24 11:11:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 660. [2021-10-24 11:11:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.748103186646434) internal successors, (2470), 659 states have internal predecessors, (2470), 0 states have call successors, (0), 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 11:11:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2470 transitions. [2021-10-24 11:11:12,991 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2470 transitions. Word has length 28 [2021-10-24 11:11:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:12,991 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2470 transitions. [2021-10-24 11:11:12,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 11:11:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2470 transitions. [2021-10-24 11:11:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:11:12,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:12,995 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] [2021-10-24 11:11:13,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:13,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:13,216 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:13,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1211902025, now seen corresponding path program 11 times [2021-10-24 11:11:13,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:13,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644118283] [2021-10-24 11:11:13,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:11:13,217 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:13,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:13,218 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:13,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-24 11:11:13,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:11:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:13,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:11:13,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:13,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:14,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:14,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644118283] [2021-10-24 11:11:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644118283] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:11:14,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:11:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:11:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185486647] [2021-10-24 11:11:14,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:11:14,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:11:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:11:14,058 INFO L87 Difference]: Start difference. First operand 660 states and 2470 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:11:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:14,682 INFO L93 Difference]: Finished difference Result 872 states and 3116 transitions. [2021-10-24 11:11:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 11:11:14,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:11:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:14,688 INFO L225 Difference]: With dead ends: 872 [2021-10-24 11:11:14,688 INFO L226 Difference]: Without dead ends: 872 [2021-10-24 11:11:14,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-10-24 11:11:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-10-24 11:11:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 608. [2021-10-24 11:11:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.7215815485996706) internal successors, (2259), 607 states have internal predecessors, (2259), 0 states have call successors, (0), 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 11:11:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2259 transitions. [2021-10-24 11:11:14,715 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2259 transitions. Word has length 28 [2021-10-24 11:11:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:14,715 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 2259 transitions. [2021-10-24 11:11:14,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:11:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2259 transitions. [2021-10-24 11:11:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:11:14,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:14,719 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] [2021-10-24 11:11:14,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-24 11:11:14,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:14,955 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:14,956 INFO L82 PathProgramCache]: Analyzing trace with hash -646076680, now seen corresponding path program 1 times [2021-10-24 11:11:14,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:14,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098721369] [2021-10-24 11:11:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:11:14,956 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:14,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:14,958 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:14,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-24 11:11:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:11:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 11:11:15,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 11:11:15,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:15,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098721369] [2021-10-24 11:11:15,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098721369] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:15,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [744503814] [2021-10-24 11:11:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:11:15,925 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:11:15,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:11:15,940 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:11:15,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-24 11:11:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:16,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 11:11:16,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:16,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:11:16,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [744503814] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:16,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776440813] [2021-10-24 11:11:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:11:16,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:11:16,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:11:16,971 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:11:16,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-24 11:11:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:17,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 11:11:17,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 11:11:17,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 11:11:17,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776440813] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:17,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:11:17,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 5, 5] total 24 [2021-10-24 11:11:17,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262795013] [2021-10-24 11:11:17,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-24 11:11:17,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-24 11:11:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-10-24 11:11:17,812 INFO L87 Difference]: Start difference. First operand 608 states and 2259 transitions. Second operand has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 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 11:11:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:26,053 INFO L93 Difference]: Finished difference Result 1558 states and 5965 transitions. [2021-10-24 11:11:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-24 11:11:26,055 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 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 29 [2021-10-24 11:11:26,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:26,061 INFO L225 Difference]: With dead ends: 1558 [2021-10-24 11:11:26,061 INFO L226 Difference]: Without dead ends: 1505 [2021-10-24 11:11:26,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2141.4ms TimeCoverageRelationStatistics Valid=501, Invalid=1949, Unknown=0, NotChecked=0, Total=2450 [2021-10-24 11:11:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-10-24 11:11:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 865. [2021-10-24 11:11:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.892361111111111) internal successors, (3363), 864 states have internal predecessors, (3363), 0 states have call successors, (0), 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 11:11:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3363 transitions. [2021-10-24 11:11:26,105 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3363 transitions. Word has length 29 [2021-10-24 11:11:26,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:26,105 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 3363 transitions. [2021-10-24 11:11:26,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 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 11:11:26,106 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3363 transitions. [2021-10-24 11:11:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-24 11:11:26,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:26,110 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-24 11:11:26,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:26,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:26,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:26,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:11:26,726 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash -40713427, now seen corresponding path program 2 times [2021-10-24 11:11:26,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:26,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276785620] [2021-10-24 11:11:26,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:11:26,727 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:26,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:26,728 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:26,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-24 11:11:27,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:11:27,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 11:11:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:11:27,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-24 11:11:27,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:27,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276785620] [2021-10-24 11:11:27,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276785620] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:11:27,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:11:27,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-10-24 11:11:27,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400050353] [2021-10-24 11:11:27,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:11:27,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:27,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:11:27,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-24 11:11:27,875 INFO L87 Difference]: Start difference. First operand 865 states and 3363 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:11:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:28,875 INFO L93 Difference]: Finished difference Result 1131 states and 4426 transitions. [2021-10-24 11:11:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:11:28,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 32 [2021-10-24 11:11:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:28,881 INFO L225 Difference]: With dead ends: 1131 [2021-10-24 11:11:28,882 INFO L226 Difference]: Without dead ends: 1131 [2021-10-24 11:11:28,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-10-24 11:11:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-10-24 11:11:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 843. [2021-10-24 11:11:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.8717339667458432) internal successors, (3260), 842 states have internal predecessors, (3260), 0 states have call successors, (0), 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 11:11:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 3260 transitions. [2021-10-24 11:11:28,920 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 3260 transitions. Word has length 32 [2021-10-24 11:11:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:28,920 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 3260 transitions. [2021-10-24 11:11:28,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:11:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 3260 transitions. [2021-10-24 11:11:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-24 11:11:28,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:28,924 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-24 11:11:28,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:29,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:29,139 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:29,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1694449795, now seen corresponding path program 3 times [2021-10-24 11:11:29,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:29,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421903069] [2021-10-24 11:11:29,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:11:29,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:29,140 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:29,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-24 11:11:29,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:11:29,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:29,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:11:29,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:11:29,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:11:30,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:30,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421903069] [2021-10-24 11:11:30,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421903069] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:30,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881693626] [2021-10-24 11:11:30,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:11:30,114 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:11:30,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:11:30,115 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:11:30,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-24 11:11:31,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:11:31,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:31,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 11:11:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:11:31,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:11:31,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [881693626] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:31,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803062142] [2021-10-24 11:11:31,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:11:31,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:11:31,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:11:31,766 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:11:31,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-24 11:11:32,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:11:32,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 11:11:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:11:32,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:11:32,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803062142] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:32,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:11:32,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 20 [2021-10-24 11:11:32,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899237078] [2021-10-24 11:11:32,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-24 11:11:32,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-24 11:11:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-10-24 11:11:32,669 INFO L87 Difference]: Start difference. First operand 843 states and 3260 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 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 11:11:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:36,807 INFO L93 Difference]: Finished difference Result 2521 states and 9367 transitions. [2021-10-24 11:11:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-24 11:11:36,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 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 32 [2021-10-24 11:11:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:36,825 INFO L225 Difference]: With dead ends: 2521 [2021-10-24 11:11:36,825 INFO L226 Difference]: Without dead ends: 2473 [2021-10-24 11:11:36,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1313.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2021-10-24 11:11:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-10-24 11:11:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1125. [2021-10-24 11:11:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.758896797153025) internal successors, (4225), 1124 states have internal predecessors, (4225), 0 states have call successors, (0), 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 11:11:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 4225 transitions. [2021-10-24 11:11:36,882 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 4225 transitions. Word has length 32 [2021-10-24 11:11:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:36,882 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 4225 transitions. [2021-10-24 11:11:36,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 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 11:11:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 4225 transitions. [2021-10-24 11:11:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-24 11:11:36,886 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:36,887 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-24 11:11:36,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:37,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-24 11:11:37,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-24 11:11:37,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:37,492 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1311615948, now seen corresponding path program 1 times [2021-10-24 11:11:37,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:37,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133077879] [2021-10-24 11:11:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:11:37,493 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:37,494 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:37,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-24 11:11:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:38,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:11:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:11:38,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:11:38,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:38,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133077879] [2021-10-24 11:11:38,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133077879] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:38,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [333852821] [2021-10-24 11:11:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:11:38,505 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:11:38,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:11:38,506 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:11:38,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-24 11:11:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:39,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:11:39,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:11:39,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:11:39,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [333852821] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:39,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117570036] [2021-10-24 11:11:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:11:39,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:11:39,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:11:39,997 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:11:39,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-24 11:11:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:40,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 11:11:40,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:11:40,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:11:40,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117570036] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:40,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:11:40,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 20 [2021-10-24 11:11:40,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203581348] [2021-10-24 11:11:40,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-24 11:11:40,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-24 11:11:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-24 11:11:40,953 INFO L87 Difference]: Start difference. First operand 1125 states and 4225 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 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 11:11:44,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:44,457 INFO L93 Difference]: Finished difference Result 1925 states and 7163 transitions. [2021-10-24 11:11:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-24 11:11:44,458 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 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 32 [2021-10-24 11:11:44,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:44,468 INFO L225 Difference]: With dead ends: 1925 [2021-10-24 11:11:44,468 INFO L226 Difference]: Without dead ends: 1925 [2021-10-24 11:11:44,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1147.7ms TimeCoverageRelationStatistics Valid=505, Invalid=1565, Unknown=0, NotChecked=0, Total=2070 [2021-10-24 11:11:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-10-24 11:11:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 803. [2021-10-24 11:11:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.7231920199501247) internal successors, (2986), 802 states have internal predecessors, (2986), 0 states have call successors, (0), 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 11:11:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2986 transitions. [2021-10-24 11:11:44,514 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2986 transitions. Word has length 32 [2021-10-24 11:11:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:44,514 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 2986 transitions. [2021-10-24 11:11:44,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 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 11:11:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2986 transitions. [2021-10-24 11:11:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-24 11:11:44,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:44,518 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-24 11:11:44,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:44,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:44,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:45,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:45,131 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash -247193430, now seen corresponding path program 1 times [2021-10-24 11:11:45,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:45,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526081966] [2021-10-24 11:11:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:11:45,132 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:45,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:45,134 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:45,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-24 11:11:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:11:46,324 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 11:11:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:11:47,042 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 11:11:47,042 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 11:11:47,043 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:11:47,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-24 11:11:47,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-24 11:11:47,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-24 11:11:47,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:47,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:47,272 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-24 11:11:47,272 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:11:47,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:11:47 BasicIcfg [2021-10-24 11:11:47,450 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:11:47,451 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:11:47,451 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:11:47,451 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:11:47,452 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:41" (3/4) ... [2021-10-24 11:11:47,453 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 11:11:47,638 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b90799c-832c-443f-906f-5c27d37a7153/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:11:47,638 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:11:47,639 INFO L168 Benchmark]: Toolchain (without parser) took 127911.80 ms. Allocated memory was 69.2 MB in the beginning and 119.5 MB in the end (delta: 50.3 MB). Free memory was 48.3 MB in the beginning and 48.9 MB in the end (delta: -586.1 kB). Peak memory consumption was 51.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:47,640 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 69.2 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:11:47,640 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.86 ms. Allocated memory is still 69.2 MB. Free memory was 48.1 MB in the beginning and 49.6 MB in the end (delta: -1.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:47,641 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.35 ms. Allocated memory is still 69.2 MB. Free memory was 49.6 MB in the beginning and 47.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:47,641 INFO L168 Benchmark]: Boogie Preprocessor took 46.41 ms. Allocated memory is still 69.2 MB. Free memory was 47.2 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:47,642 INFO L168 Benchmark]: RCFGBuilder took 1248.58 ms. Allocated memory is still 69.2 MB. Free memory was 45.1 MB in the beginning and 34.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:47,642 INFO L168 Benchmark]: TraceAbstraction took 125953.63 ms. Allocated memory was 69.2 MB in the beginning and 119.5 MB in the end (delta: 50.3 MB). Free memory was 33.7 MB in the beginning and 61.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 60.6 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:47,643 INFO L168 Benchmark]: Witness Printer took 187.21 ms. Allocated memory is still 119.5 MB. Free memory was 61.5 MB in the beginning and 48.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:47,645 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 69.2 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 411.86 ms. Allocated memory is still 69.2 MB. Free memory was 48.1 MB in the beginning and 49.6 MB in the end (delta: -1.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.35 ms. Allocated memory is still 69.2 MB. Free memory was 49.6 MB in the beginning and 47.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.41 ms. Allocated memory is still 69.2 MB. Free memory was 47.2 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1248.58 ms. Allocated memory is still 69.2 MB. Free memory was 45.1 MB in the beginning and 34.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 125953.63 ms. Allocated memory was 69.2 MB in the beginning and 119.5 MB in the end (delta: 50.3 MB). Free memory was 33.7 MB in the beginning and 61.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 60.6 MB. Max. memory is 16.1 GB. * Witness Printer took 187.21 ms. Allocated memory is still 119.5 MB. Free memory was 61.5 MB in the beginning and 48.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 54757.3ms, 241 PlacesBefore, 42 PlacesAfterwards, 257 TransitionsBefore, 41 TransitionsAfterwards, 3162 CoEnabledTransitionPairs, 8 FixpointIterations, 163 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 36 TrivialYvCompositions, 16 ConcurrentYvCompositions, 17 ChoiceCompositions, 271 TotalNumberOfCompositions, 5729 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3832, positive: 3662, positive conditional: 0, positive unconditional: 3662, negative: 170, negative conditional: 0, negative unconditional: 170, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2199, positive: 2146, positive conditional: 0, positive unconditional: 2146, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2199, positive: 2146, positive conditional: 0, positive unconditional: 2146, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 53, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 9674, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 9674, negative conditional: 0, negative unconditional: 9674, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3832, positive: 1516, positive conditional: 0, positive unconditional: 1516, negative: 117, negative conditional: 0, negative unconditional: 117, unknown: 2199, unknown conditional: 0, unknown unconditional: 2199] , Statistics on independence cache: Total cache size (in pairs): 218, Positive cache size: 200, Positive conditional cache size: 0, Positive unconditional cache size: 200, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18 - 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 - CounterExampleResult [Line: 109]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int *A, *B, *C; [L42] 0 int mina, minb, minc, N, p; [L86] 0 pthread_t t1, t2, t3; [L88] 0 N = __VERIFIER_nondet_int() [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L118] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L119] 0 int i = 0; VAL [A={0:0}, B={0:0}, C={0:0}, mina=0, minb=0, minc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={0:0}, B={0:0}, C={0:0}, mina=0, minb=0, minc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={0:0}, B={0:0}, C={0:0}, mina=0, minb=0, minc=0, N=2, p=0] [L119] COND FALSE 0 !(i < size) [L122] 0 return arr; [L90] 0 A = create_fresh_int_array(N) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L118] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L119] 0 int i = 0; VAL [A={1:0}, B={0:0}, C={0:0}, mina=0, minb=0, minc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={1:0}, B={0:0}, C={0:0}, mina=0, minb=0, minc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={1:0}, B={0:0}, C={0:0}, mina=0, minb=0, minc=0, N=2, p=0] [L119] COND FALSE 0 !(i < size) [L122] 0 return arr; [L91] 0 B = create_fresh_int_array(N) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L118] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L119] 0 int i = 0; VAL [A={1:0}, B={2:0}, C={0:0}, mina=0, minb=0, minc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={1:0}, B={2:0}, C={0:0}, mina=0, minb=0, minc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={1:0}, B={2:0}, C={0:0}, mina=0, minb=0, minc=0, N=2, p=0] [L119] COND FALSE 0 !(i < size) [L122] 0 return arr; [L92] 0 C = create_fresh_int_array(N) [L94] 0 p = 1 [L96] EXPR 0 A[0] [L96] 0 mina = A[0] [L97] EXPR 0 B[0] [L97] 0 minb = B[0] [L98] EXPR 0 A[0] [L98] EXPR 0 B[0] [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L128] 0 return a + b; [L98] 0 minc = plus(A[0], B[0]) [L101] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={1:0}, B={2:0}, C={3:0}, mina=-2147480485, minb=3072, minc=-2147477413, N=2, p=1] [L48] 1 int i=1; VAL [A={1:0}, B={2:0}, C={3:0}, i=1, mina=-2147480485, minb=3072, minc=-2147477413, N=2, p=1] [L102] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={1:0}, B={2:0}, C={3:0}, i=1, mina=-2147480485, minb=3072, minc=-2147477413, N=2, p=1] [L61] 2 int i=1; VAL [A={1:0}, B={2:0}, C={3:0}, i=1, mina=-2147480485, minb=3072, minc=-2147477413, N=2, p=1] [L61] COND TRUE 2 i= C[i]) [L78] 3 i++ VAL [A={1:0}, B={2:0}, C={3:0}, i=1, i=2, mina=-2147480485, minb=3072, minc=-2147477413, N=2, p=2] [L73] COND FALSE 3 !(i < N) [L82] 3 return 0; [L48] COND TRUE 1 i= A[i]) [L52] EXPR 1 B[i] VAL [\result={0:0}, A={1:0}, B={2:0}, B[i]=-2147480064, C={3:0}, i=2, i=1, mina=-2147480485, minb=3072, minc=-2147477413, N=2, p=2] [L52] COND TRUE 1 minb >= B[i] [L53] EXPR 1 B[i] [L53] 1 minb = B[i] [L48] 1 i++ VAL [\result={0:0}, A={1:0}, B={2:0}, B[i]=9, C={3:0}, i=2, i=2, mina=-2147480485, minb=-2147480064, minc=-2147477413, N=2, p=2] [L48] COND FALSE 1 !(i