./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.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_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/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_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/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_4508885d-e690-4381-a07a-f302cb4f3e41/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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 ............................................................................................................................................ 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_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/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_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/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_4508885d-e690-4381-a07a-f302cb4f3e41/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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:27:56,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:27:56,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:27:56,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:27:56,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:27:56,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:27:56,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:27:56,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:27:56,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:27:56,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:27:56,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:27:56,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:27:56,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:27:56,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:27:56,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:27:56,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:27:56,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:27:56,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:27:56,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:27:56,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:27:56,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:27:56,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:27:56,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:27:56,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:27:56,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:27:56,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:27:56,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:27:56,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:27:56,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:27:56,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:27:56,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:27:56,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:27:56,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:27:56,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:27:56,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:27:56,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:27:56,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:27:56,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:27:56,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:27:56,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:27:56,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:27:56,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:27:57,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:27:57,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:27:57,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:27:57,008 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:27:57,008 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:27:57,008 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:27:57,008 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:27:57,009 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:27:57,015 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:27:57,015 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:27:57,015 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:27:57,015 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:27:57,016 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:27:57,016 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:27:57,016 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:27:57,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:27:57,017 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:27:57,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:27:57,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:27:57,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:27:57,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:27:57,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:27:57,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:27:57,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:27:57,019 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:27:57,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:27:57,019 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:27:57,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:27:57,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:27:57,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:27:57,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:27:57,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:27:57,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:27:57,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:27:57,021 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:27:57,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:27:57,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:27:57,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:27:57,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:27:57,024 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_4508885d-e690-4381-a07a-f302cb4f3e41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2021-10-24 10:27:57,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:27:57,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:27:57,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:27:57,340 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:27:57,341 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:27:57,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-24 10:27:57,427 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data/6acbef9e3/bdd53b42fa9b49dfa322fca37e05a0ee/FLAG72eba3179 [2021-10-24 10:27:57,987 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:27:57,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-24 10:27:58,003 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data/6acbef9e3/bdd53b42fa9b49dfa322fca37e05a0ee/FLAG72eba3179 [2021-10-24 10:27:58,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data/6acbef9e3/bdd53b42fa9b49dfa322fca37e05a0ee [2021-10-24 10:27:58,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:27:58,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:27:58,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:27:58,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:27:58,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:27:58,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:27:58" (1/1) ... [2021-10-24 10:27:58,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a80f4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:27:58, skipping insertion in model container [2021-10-24 10:27:58,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:27:58" (1/1) ... [2021-10-24 10:27:58,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:27:58,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:27:58,641 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_4508885d-e690-4381-a07a-f302cb4f3e41/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-10-24 10:27:58,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:27:58,677 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 10:27:58,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@153213be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:27:58, skipping insertion in model container [2021-10-24 10:27:58,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:27:58,678 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 10:27:58,681 INFO L168 Benchmark]: Toolchain (without parser) took 303.28 ms. Allocated memory is still 107.0 MB. Free memory was 66.5 MB in the beginning and 82.3 MB in the end (delta: -15.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:27:58,683 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 83.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:27:58,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.69 ms. Allocated memory is still 107.0 MB. Free memory was 66.3 MB in the beginning and 82.6 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:27:58,688 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 83.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.69 ms. Allocated memory is still 107.0 MB. Free memory was 66.3 MB in the beginning and 82.6 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 99]: 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 10:28:00,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:28:00,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:28:00,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:28:00,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:28:00,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:28:00,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:28:00,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:28:00,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:28:01,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:28:01,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:28:01,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:28:01,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:28:01,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:28:01,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:28:01,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:28:01,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:28:01,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:28:01,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:28:01,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:28:01,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:28:01,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:28:01,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:28:01,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:28:01,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:28:01,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:28:01,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:28:01,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:28:01,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:28:01,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:28:01,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:28:01,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:28:01,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:28:01,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:28:01,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:28:01,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:28:01,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:28:01,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:28:01,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:28:01,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:28:01,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:28:01,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 10:28:01,113 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:28:01,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:28:01,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:28:01,115 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:28:01,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:28:01,115 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:28:01,116 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:28:01,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:28:01,116 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:28:01,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:28:01,119 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:28:01,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:28:01,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:28:01,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:28:01,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:28:01,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:28:01,120 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:28:01,120 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 10:28:01,121 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 10:28:01,121 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:28:01,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:28:01,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:28:01,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:28:01,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:28:01,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 10:28:01,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:28:01,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:28:01,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:28:01,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:28:01,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:28:01,123 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 10:28:01,124 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:01,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:28:01,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:28:01,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:28:01,125 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_4508885d-e690-4381-a07a-f302cb4f3e41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2021-10-24 10:28:01,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:28:01,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:28:01,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:28:01,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:28:01,497 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:28:01,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-24 10:28:01,562 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data/e88613294/ddf80487b4564083adfc65691dc939ab/FLAG8d03aec65 [2021-10-24 10:28:02,082 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:28:02,083 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-24 10:28:02,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data/e88613294/ddf80487b4564083adfc65691dc939ab/FLAG8d03aec65 [2021-10-24 10:28:02,436 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/data/e88613294/ddf80487b4564083adfc65691dc939ab [2021-10-24 10:28:02,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:28:02,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:28:02,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:28:02,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:28:02,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:28:02,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@411c14be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02, skipping insertion in model container [2021-10-24 10:28:02,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:28:02,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:28:02,680 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_4508885d-e690-4381-a07a-f302cb4f3e41/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-10-24 10:28:02,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:28:02,700 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 10:28:02,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:28:02,720 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_4508885d-e690-4381-a07a-f302cb4f3e41/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-10-24 10:28:02,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:28:02,729 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:28:02,797 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_4508885d-e690-4381-a07a-f302cb4f3e41/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-10-24 10:28:02,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:28:02,817 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:28:02,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02 WrapperNode [2021-10-24 10:28:02,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:28:02,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:28:02,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:28:02,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:28:02,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:28:02,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:28:02,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:28:02,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:28:02,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:28:02,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:28:02,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:28:02,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:28:02,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (1/1) ... [2021-10-24 10:28:02,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:28:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:02,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:28:02,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:28:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 10:28:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:28:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 10:28:02,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-24 10:28:02,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-24 10:28:02,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-24 10:28:02,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-24 10:28:02,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-24 10:28:02,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-24 10:28:02,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 10:28:02,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:28:02,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:28:02,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:28:02,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 10:28:02,970 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 10:28:03,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:28:03,561 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-24 10:28:03,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:28:03 BoogieIcfgContainer [2021-10-24 10:28:03,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:28:03,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:28:03,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:28:03,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:28:03,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:28:02" (1/3) ... [2021-10-24 10:28:03,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c61627a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:28:03, skipping insertion in model container [2021-10-24 10:28:03,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:02" (2/3) ... [2021-10-24 10:28:03,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c61627a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:28:03, skipping insertion in model container [2021-10-24 10:28:03,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:28:03" (3/3) ... [2021-10-24 10:28:03,571 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2021-10-24 10:28:03,576 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-24 10:28:03,576 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:28:03,576 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:28:03,576 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-24 10:28:03,611 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,611 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,611 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,612 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,612 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,612 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,612 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,613 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,613 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,613 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,613 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,613 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,614 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,614 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,614 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,615 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,615 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,615 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,615 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,615 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,616 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,616 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,616 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,616 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,616 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,617 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,617 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,617 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,618 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,618 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,618 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,618 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,619 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,619 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,619 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,619 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,619 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,620 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,620 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,620 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,620 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,620 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,621 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,621 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,621 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,622 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,622 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,622 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,622 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,622 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,623 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,623 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,623 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,623 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,624 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,624 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,624 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,624 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,625 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,625 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,625 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,625 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,626 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,626 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,626 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,626 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,626 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,627 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,627 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,627 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,628 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,628 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,628 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,628 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,628 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,629 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,629 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,629 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,629 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,629 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,630 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,630 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,630 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,630 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,633 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,633 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,634 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,634 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,634 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,639 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,642 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,642 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,642 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,642 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,642 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:28:03,650 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-24 10:28:03,693 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:28:03,705 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 10:28:03,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-24 10:28:03,732 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-24 10:28:03,746 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 143 transitions, 310 flow [2021-10-24 10:28:03,753 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 143 transitions, 310 flow [2021-10-24 10:28:03,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 143 transitions, 310 flow [2021-10-24 10:28:03,869 INFO L129 PetriNetUnfolder]: 12/140 cut-off events. [2021-10-24 10:28:03,869 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-24 10:28:03,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 140 events. 12/140 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 103. Up to 2 conditions per place. [2021-10-24 10:28:03,880 INFO L116 LiptonReduction]: Number of co-enabled transitions 1728 [2021-10-24 10:28:16,878 INFO L131 LiptonReduction]: Checked pairs total: 1798 [2021-10-24 10:28:16,879 INFO L133 LiptonReduction]: Total number of compositions: 132 [2021-10-24 10:28:16,886 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 28 transitions, 80 flow [2021-10-24 10:28:16,903 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:16,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-24 10:28:16,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:16,914 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] [2021-10-24 10:28:16,915 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 10:28:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:16,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1951902287, now seen corresponding path program 1 times [2021-10-24 10:28:16,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:16,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017400339] [2021-10-24 10:28:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:16,934 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:16,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:16,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:16,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 10:28:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:28:17,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:17,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:17,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:17,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017400339] [2021-10-24 10:28:17,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017400339] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:17,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:17,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-24 10:28:17,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513515990] [2021-10-24 10:28:17,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:28:17,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:28:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:28:17,661 INFO L87 Difference]: Start difference. First operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 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 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:17,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:17,717 INFO L93 Difference]: Finished difference Result 204 states and 632 transitions. [2021-10-24 10:28:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:28:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-24 10:28:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:17,741 INFO L225 Difference]: With dead ends: 204 [2021-10-24 10:28:17,741 INFO L226 Difference]: Without dead ends: 197 [2021-10-24 10:28:17,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:28:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-24 10:28:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-10-24 10:28:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 3.13265306122449) internal successors, (614), 196 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 614 transitions. [2021-10-24 10:28:17,839 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 614 transitions. Word has length 20 [2021-10-24 10:28:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:17,840 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 614 transitions. [2021-10-24 10:28:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 614 transitions. [2021-10-24 10:28:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:17,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:17,843 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] [2021-10-24 10:28:17,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:18,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:18,051 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 10:28:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:18,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1880834181, now seen corresponding path program 1 times [2021-10-24 10:28:18,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:18,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038612641] [2021-10-24 10:28:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:18,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:18,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:18,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:18,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 10:28:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:28:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:18,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:18,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:18,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038612641] [2021-10-24 10:28:18,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038612641] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:18,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:28:18,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-10-24 10:28:18,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519019813] [2021-10-24 10:28:18,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:28:18,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:18,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:28:18,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:28:18,686 INFO L87 Difference]: Start difference. First operand 197 states and 614 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:18,924 INFO L93 Difference]: Finished difference Result 259 states and 814 transitions. [2021-10-24 10:28:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:28:18,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:18,929 INFO L225 Difference]: With dead ends: 259 [2021-10-24 10:28:18,931 INFO L226 Difference]: Without dead ends: 259 [2021-10-24 10:28:18,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:28:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-24 10:28:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 213. [2021-10-24 10:28:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.19811320754717) internal successors, (678), 212 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 678 transitions. [2021-10-24 10:28:18,957 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 678 transitions. Word has length 21 [2021-10-24 10:28:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:18,960 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 678 transitions. [2021-10-24 10:28:18,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 678 transitions. [2021-10-24 10:28:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:18,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:18,970 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] [2021-10-24 10:28:18,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:19,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:19,185 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 10:28:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash 235636759, now seen corresponding path program 1 times [2021-10-24 10:28:19,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:19,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014854710] [2021-10-24 10:28:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:19,186 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:19,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:19,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:19,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 10:28:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:19,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:28:19,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:19,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:19,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:19,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014854710] [2021-10-24 10:28:19,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014854710] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:19,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:28:19,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-10-24 10:28:19,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459310476] [2021-10-24 10:28:19,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:28:19,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:19,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:28:19,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:28:19,772 INFO L87 Difference]: Start difference. First operand 213 states and 678 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:19,995 INFO L93 Difference]: Finished difference Result 305 states and 974 transitions. [2021-10-24 10:28:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:28:19,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:19,999 INFO L225 Difference]: With dead ends: 305 [2021-10-24 10:28:19,999 INFO L226 Difference]: Without dead ends: 305 [2021-10-24 10:28:19,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:28:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-24 10:28:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 213. [2021-10-24 10:28:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.188679245283019) internal successors, (676), 212 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:20,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 676 transitions. [2021-10-24 10:28:20,015 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 676 transitions. Word has length 21 [2021-10-24 10:28:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:20,015 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 676 transitions. [2021-10-24 10:28:20,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 676 transitions. [2021-10-24 10:28:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:20,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:20,017 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] [2021-10-24 10:28:20,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:20,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:20,236 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 10:28:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash 923197355, now seen corresponding path program 1 times [2021-10-24 10:28:20,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:20,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302292136] [2021-10-24 10:28:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:20,239 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:20,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:20,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:20,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 10:28:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:20,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:28:20,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:20,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:20,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:20,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302292136] [2021-10-24 10:28:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302292136] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:20,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:28:20,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-24 10:28:20,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945921760] [2021-10-24 10:28:20,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:28:20,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:28:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:28:20,805 INFO L87 Difference]: Start difference. First operand 213 states and 676 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:20,933 INFO L93 Difference]: Finished difference Result 411 states and 1247 transitions. [2021-10-24 10:28:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:28:20,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:20,937 INFO L225 Difference]: With dead ends: 411 [2021-10-24 10:28:20,937 INFO L226 Difference]: Without dead ends: 371 [2021-10-24 10:28:20,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:28:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-10-24 10:28:20,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 283. [2021-10-24 10:28:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.152482269503546) internal successors, (889), 282 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 889 transitions. [2021-10-24 10:28:20,954 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 889 transitions. Word has length 21 [2021-10-24 10:28:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:20,954 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 889 transitions. [2021-10-24 10:28:20,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 889 transitions. [2021-10-24 10:28:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:20,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:20,956 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] [2021-10-24 10:28:20,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:21,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:21,168 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 10:28:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:21,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1077666571, now seen corresponding path program 2 times [2021-10-24 10:28:21,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:21,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523327036] [2021-10-24 10:28:21,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:28:21,169 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:21,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:21,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:21,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 10:28:21,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:28:21,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:21,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:28:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:21,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:21,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:21,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523327036] [2021-10-24 10:28:21,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523327036] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:21,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:21,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-24 10:28:21,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093162199] [2021-10-24 10:28:21,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:28:21,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:28:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:28:21,877 INFO L87 Difference]: Start difference. First operand 283 states and 889 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:22,287 INFO L93 Difference]: Finished difference Result 495 states and 1571 transitions. [2021-10-24 10:28:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 10:28:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:22,294 INFO L225 Difference]: With dead ends: 495 [2021-10-24 10:28:22,294 INFO L226 Difference]: Without dead ends: 491 [2021-10-24 10:28:22,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:28:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-24 10:28:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 339. [2021-10-24 10:28:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.260355029585799) internal successors, (1102), 338 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1102 transitions. [2021-10-24 10:28:22,311 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1102 transitions. Word has length 21 [2021-10-24 10:28:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:22,312 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1102 transitions. [2021-10-24 10:28:22,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1102 transitions. [2021-10-24 10:28:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:22,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:22,314 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] [2021-10-24 10:28:22,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:22,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:22,526 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 10:28:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:22,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2099040221, now seen corresponding path program 3 times [2021-10-24 10:28:22,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:22,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424672928] [2021-10-24 10:28:22,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:28:22,528 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:22,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:22,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:22,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 10:28:22,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:28:22,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:28:22,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:23,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:23,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:23,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424672928] [2021-10-24 10:28:23,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424672928] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:23,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:23,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-24 10:28:23,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441268065] [2021-10-24 10:28:23,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:28:23,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:28:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:28:23,202 INFO L87 Difference]: Start difference. First operand 339 states and 1102 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:23,636 INFO L93 Difference]: Finished difference Result 577 states and 1747 transitions. [2021-10-24 10:28:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 10:28:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:23,644 INFO L225 Difference]: With dead ends: 577 [2021-10-24 10:28:23,644 INFO L226 Difference]: Without dead ends: 557 [2021-10-24 10:28:23,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:28:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-10-24 10:28:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 317. [2021-10-24 10:28:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.2056962025316458) internal successors, (1013), 316 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 1013 transitions. [2021-10-24 10:28:23,662 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 1013 transitions. Word has length 21 [2021-10-24 10:28:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:23,662 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 1013 transitions. [2021-10-24 10:28:23,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 1013 transitions. [2021-10-24 10:28:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:23,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:23,664 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] [2021-10-24 10:28:23,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-24 10:28:23,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:23,876 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 10:28:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:23,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1823547957, now seen corresponding path program 4 times [2021-10-24 10:28:23,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:23,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754448120] [2021-10-24 10:28:23,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:28:23,877 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:23,878 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:23,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 10:28:24,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:28:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:24,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:28:24,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:24,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:24,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:24,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754448120] [2021-10-24 10:28:24,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754448120] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:24,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:24,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-24 10:28:24,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314193137] [2021-10-24 10:28:24,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:28:24,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:28:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:28:24,556 INFO L87 Difference]: Start difference. First operand 317 states and 1013 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:24,945 INFO L93 Difference]: Finished difference Result 431 states and 1314 transitions. [2021-10-24 10:28:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 10:28:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-24 10:28:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:24,952 INFO L225 Difference]: With dead ends: 431 [2021-10-24 10:28:24,952 INFO L226 Difference]: Without dead ends: 423 [2021-10-24 10:28:24,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:28:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-10-24 10:28:24,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 325. [2021-10-24 10:28:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.2037037037037037) internal successors, (1038), 324 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1038 transitions. [2021-10-24 10:28:24,993 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1038 transitions. Word has length 21 [2021-10-24 10:28:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:24,993 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 1038 transitions. [2021-10-24 10:28:24,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1038 transitions. [2021-10-24 10:28:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:24,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:24,995 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] [2021-10-24 10:28:25,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:25,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:25,208 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 10:28:25,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:25,209 INFO L82 PathProgramCache]: Analyzing trace with hash 947718493, now seen corresponding path program 5 times [2021-10-24 10:28:25,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:25,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784970461] [2021-10-24 10:28:25,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:28:25,209 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:25,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:25,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:25,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 10:28:25,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:28:25,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:25,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:28:25,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:25,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:26,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:26,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784970461] [2021-10-24 10:28:26,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784970461] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:26,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:28:26,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-24 10:28:26,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034332658] [2021-10-24 10:28:26,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 10:28:26,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:26,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 10:28:26,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:28:26,305 INFO L87 Difference]: Start difference. First operand 325 states and 1038 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:26,855 INFO L93 Difference]: Finished difference Result 429 states and 1330 transitions. [2021-10-24 10:28:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:28:26,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:26,860 INFO L225 Difference]: With dead ends: 429 [2021-10-24 10:28:26,860 INFO L226 Difference]: Without dead ends: 423 [2021-10-24 10:28:26,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 630.6ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-10-24 10:28:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-10-24 10:28:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 333. [2021-10-24 10:28:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.174698795180723) internal successors, (1054), 332 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1054 transitions. [2021-10-24 10:28:26,876 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1054 transitions. Word has length 21 [2021-10-24 10:28:26,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:26,877 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 1054 transitions. [2021-10-24 10:28:26,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1054 transitions. [2021-10-24 10:28:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:26,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:26,879 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] [2021-10-24 10:28:26,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:27,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:27,092 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 10:28:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash -73655157, now seen corresponding path program 6 times [2021-10-24 10:28:27,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:27,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803795102] [2021-10-24 10:28:27,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 10:28:27,093 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:27,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:27,094 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:27,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 10:28:27,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 10:28:27,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:27,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:28:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:27,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:27,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:27,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803795102] [2021-10-24 10:28:27,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803795102] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:27,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:27,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-24 10:28:27,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522180700] [2021-10-24 10:28:27,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:28:27,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:28:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:28:27,803 INFO L87 Difference]: Start difference. First operand 333 states and 1054 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:28,116 INFO L93 Difference]: Finished difference Result 591 states and 1701 transitions. [2021-10-24 10:28:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:28:28,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:28,122 INFO L225 Difference]: With dead ends: 591 [2021-10-24 10:28:28,122 INFO L226 Difference]: Without dead ends: 569 [2021-10-24 10:28:28,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:28:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-10-24 10:28:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 323. [2021-10-24 10:28:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.18944099378882) internal successors, (1027), 322 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1027 transitions. [2021-10-24 10:28:28,140 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1027 transitions. Word has length 21 [2021-10-24 10:28:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:28,140 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 1027 transitions. [2021-10-24 10:28:28,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1027 transitions. [2021-10-24 10:28:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:28,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:28,143 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] [2021-10-24 10:28:28,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:28,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:28,355 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 10:28:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:28,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1392564933, now seen corresponding path program 2 times [2021-10-24 10:28:28,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:28,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470790830] [2021-10-24 10:28:28,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:28:28,359 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:28,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:28,360 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:28,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 10:28:28,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:28:28,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:28:28,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:29,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:29,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:29,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470790830] [2021-10-24 10:28:29,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470790830] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:29,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:29,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-24 10:28:29,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565848533] [2021-10-24 10:28:29,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:28:29,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:28:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:28:29,216 INFO L87 Difference]: Start difference. First operand 323 states and 1027 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:29,784 INFO L93 Difference]: Finished difference Result 447 states and 1400 transitions. [2021-10-24 10:28:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:28:29,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:29,791 INFO L225 Difference]: With dead ends: 447 [2021-10-24 10:28:29,791 INFO L226 Difference]: Without dead ends: 433 [2021-10-24 10:28:29,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:28:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-10-24 10:28:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 377. [2021-10-24 10:28:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.271276595744681) internal successors, (1230), 376 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1230 transitions. [2021-10-24 10:28:29,808 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1230 transitions. Word has length 21 [2021-10-24 10:28:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:29,809 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1230 transitions. [2021-10-24 10:28:29,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1230 transitions. [2021-10-24 10:28:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:29,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:29,811 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] [2021-10-24 10:28:29,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:30,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:30,027 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 10:28:30,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:30,027 INFO L82 PathProgramCache]: Analyzing trace with hash -771718329, now seen corresponding path program 3 times [2021-10-24 10:28:30,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:30,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788307269] [2021-10-24 10:28:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:28:30,027 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:30,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:30,028 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:30,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-24 10:28:30,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:28:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 10:28:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:30,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:30,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:30,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788307269] [2021-10-24 10:28:30,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788307269] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:30,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:30,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 10 [2021-10-24 10:28:30,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078363817] [2021-10-24 10:28:30,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 10:28:30,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:30,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 10:28:30,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:28:30,852 INFO L87 Difference]: Start difference. First operand 377 states and 1230 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:31,558 INFO L93 Difference]: Finished difference Result 515 states and 1487 transitions. [2021-10-24 10:28:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 10:28:31,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:31,563 INFO L225 Difference]: With dead ends: 515 [2021-10-24 10:28:31,564 INFO L226 Difference]: Without dead ends: 451 [2021-10-24 10:28:31,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:28:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-24 10:28:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 317. [2021-10-24 10:28:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0917721518987342) internal successors, (977), 316 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 977 transitions. [2021-10-24 10:28:31,587 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 977 transitions. Word has length 21 [2021-10-24 10:28:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:31,587 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 977 transitions. [2021-10-24 10:28:31,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 977 transitions. [2021-10-24 10:28:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:31,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:31,589 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] [2021-10-24 10:28:31,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:31,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:31,803 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 10:28:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:31,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1000088941, now seen corresponding path program 7 times [2021-10-24 10:28:31,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:31,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686153398] [2021-10-24 10:28:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 10:28:31,804 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:31,805 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:31,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-24 10:28:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:32,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:28:32,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:32,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:32,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:32,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686153398] [2021-10-24 10:28:32,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686153398] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:32,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:32,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-24 10:28:32,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048607581] [2021-10-24 10:28:32,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:28:32,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:32,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:28:32,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:28:32,647 INFO L87 Difference]: Start difference. First operand 317 states and 977 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:33,069 INFO L93 Difference]: Finished difference Result 421 states and 1212 transitions. [2021-10-24 10:28:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 10:28:33,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2021-10-24 10:28:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:33,074 INFO L225 Difference]: With dead ends: 421 [2021-10-24 10:28:33,074 INFO L226 Difference]: Without dead ends: 380 [2021-10-24 10:28:33,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:28:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-10-24 10:28:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 224. [2021-10-24 10:28:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.1300448430493275) internal successors, (698), 223 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 698 transitions. [2021-10-24 10:28:33,087 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 698 transitions. Word has length 21 [2021-10-24 10:28:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:33,087 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 698 transitions. [2021-10-24 10:28:33,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 698 transitions. [2021-10-24 10:28:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:28:33,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:33,089 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 10:28:33,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:33,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:33,303 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 10:28:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:33,303 INFO L82 PathProgramCache]: Analyzing trace with hash 941183636, now seen corresponding path program 1 times [2021-10-24 10:28:33,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:33,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221150428] [2021-10-24 10:28:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:33,304 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:33,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:33,306 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:33,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-24 10:28:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:33,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:28:33,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:33,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:34,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:34,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221150428] [2021-10-24 10:28:34,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221150428] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:34,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [34029615] [2021-10-24 10:28:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:34,277 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:34,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:28:34,280 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:28:34,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-24 10:28:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:34,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:28:34,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:34,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:35,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [34029615] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:35,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074958582] [2021-10-24 10:28:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:35,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:35,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:35,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:28:35,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-24 10:28:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:35,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:28:35,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:35,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:36,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074958582] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:36,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 10:28:36,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7, 7, 8] total 34 [2021-10-24 10:28:36,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065884954] [2021-10-24 10:28:36,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:28:36,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:28:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-10-24 10:28:36,296 INFO L87 Difference]: Start difference. First operand 224 states and 698 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:36,742 INFO L93 Difference]: Finished difference Result 312 states and 951 transitions. [2021-10-24 10:28:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:28:36,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:28:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:36,746 INFO L225 Difference]: With dead ends: 312 [2021-10-24 10:28:36,746 INFO L226 Difference]: Without dead ends: 308 [2021-10-24 10:28:36,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1059.1ms TimeCoverageRelationStatistics Valid=223, Invalid=1183, Unknown=0, NotChecked=0, Total=1406 [2021-10-24 10:28:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-24 10:28:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 226. [2021-10-24 10:28:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.1244444444444444) internal successors, (703), 225 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 703 transitions. [2021-10-24 10:28:36,759 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 703 transitions. Word has length 22 [2021-10-24 10:28:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:36,760 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 703 transitions. [2021-10-24 10:28:36,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 703 transitions. [2021-10-24 10:28:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:28:36,761 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:36,761 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 10:28:36,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:36,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:37,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-24 10:28:37,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:37,365 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 10:28:37,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:37,366 INFO L82 PathProgramCache]: Analyzing trace with hash 369192970, now seen corresponding path program 2 times [2021-10-24 10:28:37,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:37,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377774481] [2021-10-24 10:28:37,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:28:37,366 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:37,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:37,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-24 10:28:37,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:28:37,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:37,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:28:37,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:38,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:38,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:38,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377774481] [2021-10-24 10:28:38,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377774481] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:38,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1675051517] [2021-10-24 10:28:38,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:28:38,457 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:38,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:28:38,459 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:28:38,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-24 10:28:39,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:28:39,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:39,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:28:39,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:39,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:39,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1675051517] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:39,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:28:39,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 18 [2021-10-24 10:28:39,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382040119] [2021-10-24 10:28:39,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:28:39,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:39,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:28:39,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-10-24 10:28:39,471 INFO L87 Difference]: Start difference. First operand 226 states and 703 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:39,690 INFO L93 Difference]: Finished difference Result 296 states and 922 transitions. [2021-10-24 10:28:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:28:39,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:28:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:39,697 INFO L225 Difference]: With dead ends: 296 [2021-10-24 10:28:39,698 INFO L226 Difference]: Without dead ends: 296 [2021-10-24 10:28:39,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-10-24 10:28:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-24 10:28:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 246. [2021-10-24 10:28:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.126530612244898) internal successors, (766), 245 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 766 transitions. [2021-10-24 10:28:39,710 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 766 transitions. Word has length 22 [2021-10-24 10:28:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:39,710 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 766 transitions. [2021-10-24 10:28:39,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 766 transitions. [2021-10-24 10:28:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:28:39,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:39,712 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 10:28:39,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:39,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:40,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:40,127 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 10:28:40,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:40,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1663840756, now seen corresponding path program 3 times [2021-10-24 10:28:40,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:40,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083186912] [2021-10-24 10:28:40,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:28:40,128 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:40,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:40,129 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:40,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-24 10:28:40,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:28:40,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:40,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:28:40,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:40,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:41,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:41,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083186912] [2021-10-24 10:28:41,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083186912] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:41,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [511238368] [2021-10-24 10:28:41,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:28:41,337 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:28:41,339 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:28:41,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-24 10:28:42,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:28:42,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:42,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:28:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:42,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:42,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [511238368] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:42,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:28:42,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-10-24 10:28:42,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20849052] [2021-10-24 10:28:42,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:28:42,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:28:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-10-24 10:28:42,482 INFO L87 Difference]: Start difference. First operand 246 states and 766 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:42,789 INFO L93 Difference]: Finished difference Result 352 states and 1092 transitions. [2021-10-24 10:28:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:28:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:28:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:42,794 INFO L225 Difference]: With dead ends: 352 [2021-10-24 10:28:42,794 INFO L226 Difference]: Without dead ends: 352 [2021-10-24 10:28:42,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-24 10:28:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-10-24 10:28:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 258. [2021-10-24 10:28:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.2412451361867705) internal successors, (833), 257 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 833 transitions. [2021-10-24 10:28:42,808 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 833 transitions. Word has length 22 [2021-10-24 10:28:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:42,808 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 833 transitions. [2021-10-24 10:28:42,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 833 transitions. [2021-10-24 10:28:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:28:42,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:42,810 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 10:28:42,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:43,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:43,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:43,222 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 10:28:43,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:43,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1799184050, now seen corresponding path program 4 times [2021-10-24 10:28:43,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:43,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914211863] [2021-10-24 10:28:43,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:28:43,223 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:43,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:43,224 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:43,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-24 10:28:43,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:28:43,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:28:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:44,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:44,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:44,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914211863] [2021-10-24 10:28:44,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914211863] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:44,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1316550782] [2021-10-24 10:28:44,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:28:44,353 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:28:44,371 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:28:44,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-24 10:28:45,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:28:45,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:45,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:28:45,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:45,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:45,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1316550782] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:45,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887940020] [2021-10-24 10:28:45,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:28:45,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:45,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:45,488 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:28:45,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-24 10:28:46,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:28:46,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:46,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:28:46,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:46,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:46,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887940020] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:46,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 10:28:46,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7, 7, 8] total 35 [2021-10-24 10:28:46,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236129453] [2021-10-24 10:28:46,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:28:46,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:28:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-10-24 10:28:46,776 INFO L87 Difference]: Start difference. First operand 258 states and 833 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:47,174 INFO L93 Difference]: Finished difference Result 344 states and 1069 transitions. [2021-10-24 10:28:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:28:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:28:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:47,179 INFO L225 Difference]: With dead ends: 344 [2021-10-24 10:28:47,179 INFO L226 Difference]: Without dead ends: 340 [2021-10-24 10:28:47,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1049.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-10-24 10:28:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-10-24 10:28:47,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 260. [2021-10-24 10:28:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.2355212355212357) internal successors, (838), 259 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 838 transitions. [2021-10-24 10:28:47,193 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 838 transitions. Word has length 22 [2021-10-24 10:28:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:47,193 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 838 transitions. [2021-10-24 10:28:47,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 838 transitions. [2021-10-24 10:28:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:28:47,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:47,195 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 10:28:47,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:47,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:47,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:47,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:28:47,812 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 10:28:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1754545858, now seen corresponding path program 5 times [2021-10-24 10:28:47,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:47,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989612357] [2021-10-24 10:28:47,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:28:47,814 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:47,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:47,815 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:47,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-24 10:28:48,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:28:48,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-24 10:28:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:48,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:48,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:48,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989612357] [2021-10-24 10:28:48,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989612357] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:48,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2128506096] [2021-10-24 10:28:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:28:48,991 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:48,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:28:48,991 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:28:48,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-24 10:28:49,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:28:49,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:28:49,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:50,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:50,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2128506096] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:50,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405684311] [2021-10-24 10:28:50,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:28:50,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:50,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:50,373 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:28:50,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-24 10:28:51,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:28:51,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:51,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:28:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:51,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:51,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405684311] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:51,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 10:28:51,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 7, 7, 8] total 33 [2021-10-24 10:28:51,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699623868] [2021-10-24 10:28:51,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:28:51,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:51,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:28:51,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-10-24 10:28:51,511 INFO L87 Difference]: Start difference. First operand 260 states and 838 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:51,887 INFO L93 Difference]: Finished difference Result 344 states and 1071 transitions. [2021-10-24 10:28:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:28:51,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:28:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:51,891 INFO L225 Difference]: With dead ends: 344 [2021-10-24 10:28:51,891 INFO L226 Difference]: Without dead ends: 342 [2021-10-24 10:28:51,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1025.5ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-10-24 10:28:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-10-24 10:28:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 262. [2021-10-24 10:28:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.2298850574712645) internal successors, (843), 261 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 843 transitions. [2021-10-24 10:28:51,904 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 843 transitions. Word has length 22 [2021-10-24 10:28:51,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:51,905 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 843 transitions. [2021-10-24 10:28:51,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 843 transitions. [2021-10-24 10:28:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:28:51,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:51,907 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 10:28:51,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-24 10:28:52,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-10-24 10:28:52,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-24 10:28:52,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:52,522 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 10:28:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1035618844, now seen corresponding path program 6 times [2021-10-24 10:28:52,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:52,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303906349] [2021-10-24 10:28:52,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 10:28:52,523 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:52,524 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:52,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-24 10:28:53,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 10:28:53,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:53,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:28:53,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:53,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:54,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:54,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303906349] [2021-10-24 10:28:54,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303906349] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:54,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [452462189] [2021-10-24 10:28:54,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 10:28:54,015 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:54,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:28:54,018 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:28:54,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-24 10:28:54,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 10:28:54,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:28:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:28:54,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:55,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:55,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [452462189] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:55,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:28:55,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-10-24 10:28:55,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932012151] [2021-10-24 10:28:55,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:28:55,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:28:55,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:28:55,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-10-24 10:28:55,491 INFO L87 Difference]: Start difference. First operand 262 states and 843 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:55,837 INFO L93 Difference]: Finished difference Result 330 states and 1041 transitions. [2021-10-24 10:28:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:28:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:28:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:55,841 INFO L225 Difference]: With dead ends: 330 [2021-10-24 10:28:55,842 INFO L226 Difference]: Without dead ends: 330 [2021-10-24 10:28:55,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 608.8ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-10-24 10:28:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-10-24 10:28:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2021-10-24 10:28:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.2319391634980987) internal successors, (850), 263 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 850 transitions. [2021-10-24 10:28:55,855 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 850 transitions. Word has length 22 [2021-10-24 10:28:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:55,856 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 850 transitions. [2021-10-24 10:28:55,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:28:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 850 transitions. [2021-10-24 10:28:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:28:55,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:55,858 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 10:28:55,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:56,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-10-24 10:28:56,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:56,266 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 10:28:56,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:56,267 INFO L82 PathProgramCache]: Analyzing trace with hash -888979340, now seen corresponding path program 7 times [2021-10-24 10:28:56,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:28:56,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722659172] [2021-10-24 10:28:56,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 10:28:56,267 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:28:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:28:56,268 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:28:56,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-24 10:28:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:56,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:28:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:57,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:57,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:28:57,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722659172] [2021-10-24 10:28:57,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722659172] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:57,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1809652003] [2021-10-24 10:28:57,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 10:28:57,500 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:28:57,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:28:57,501 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:28:57,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-24 10:28:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:28:58,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:58,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:28:58,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1809652003] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:28:58,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108537067] [2021-10-24 10:28:58,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 10:28:58,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:58,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:58,900 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:28:58,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-24 10:28:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:28:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:00,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:00,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108537067] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:29:00,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 10:29:00,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7, 7, 8] total 36 [2021-10-24 10:29:00,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564492311] [2021-10-24 10:29:00,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:29:00,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:29:00,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:29:00,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-10-24 10:29:00,458 INFO L87 Difference]: Start difference. First operand 264 states and 850 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:29:00,954 INFO L93 Difference]: Finished difference Result 404 states and 1251 transitions. [2021-10-24 10:29:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:29:00,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:29:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:29:00,959 INFO L225 Difference]: With dead ends: 404 [2021-10-24 10:29:00,959 INFO L226 Difference]: Without dead ends: 400 [2021-10-24 10:29:00,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1118.9ms TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2021-10-24 10:29:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-10-24 10:29:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 268. [2021-10-24 10:29:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.243445692883895) internal successors, (866), 267 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 866 transitions. [2021-10-24 10:29:00,974 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 866 transitions. Word has length 22 [2021-10-24 10:29:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:29:00,974 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 866 transitions. [2021-10-24 10:29:00,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 866 transitions. [2021-10-24 10:29:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:29:00,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:29:00,977 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 10:29:00,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-24 10:29:01,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-24 10:29:01,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-10-24 10:29:01,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:01,590 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 10:29:01,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:29:01,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1460970006, now seen corresponding path program 8 times [2021-10-24 10:29:01,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:29:01,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75809544] [2021-10-24 10:29:01,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:29:01,591 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:29:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:29:01,592 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:29:01,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-24 10:29:02,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:29:02,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:02,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:29:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:02,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:03,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:29:03,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75809544] [2021-10-24 10:29:03,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75809544] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:03,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [289909396] [2021-10-24 10:29:03,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:29:03,006 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:03,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:29:03,007 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:29:03,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-24 10:29:04,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:29:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:04,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:29:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:04,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:04,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [289909396] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:29:04,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:29:04,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-24 10:29:04,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680180419] [2021-10-24 10:29:04,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:29:04,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:29:04,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:29:04,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-24 10:29:04,613 INFO L87 Difference]: Start difference. First operand 268 states and 866 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:29:04,924 INFO L93 Difference]: Finished difference Result 388 states and 1222 transitions. [2021-10-24 10:29:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:29:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:29:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:29:04,927 INFO L225 Difference]: With dead ends: 388 [2021-10-24 10:29:04,928 INFO L226 Difference]: Without dead ends: 388 [2021-10-24 10:29:04,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-10-24 10:29:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-10-24 10:29:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 284. [2021-10-24 10:29:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3427561837455833) internal successors, (946), 283 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 946 transitions. [2021-10-24 10:29:04,942 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 946 transitions. Word has length 22 [2021-10-24 10:29:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:29:04,942 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 946 transitions. [2021-10-24 10:29:04,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 946 transitions. [2021-10-24 10:29:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:29:04,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:29:04,945 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] [2021-10-24 10:29:04,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-24 10:29:05,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-24 10:29:05,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:05,365 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 10:29:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:29:05,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1720921830, now seen corresponding path program 9 times [2021-10-24 10:29:05,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:29:05,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440400103] [2021-10-24 10:29:05,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:29:05,366 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:29:05,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:29:05,367 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:29:05,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-24 10:29:06,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:29:06,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:06,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:29:06,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:06,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:06,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:29:06,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440400103] [2021-10-24 10:29:06,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440400103] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760946226] [2021-10-24 10:29:06,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:29:06,945 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:06,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:29:06,950 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:29:06,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-10-24 10:29:08,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:29:08,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:08,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:29:08,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:08,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:08,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [760946226] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:29:08,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:29:08,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-24 10:29:08,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106337514] [2021-10-24 10:29:08,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:29:08,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:29:08,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:29:08,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-10-24 10:29:08,595 INFO L87 Difference]: Start difference. First operand 284 states and 946 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:29:08,881 INFO L93 Difference]: Finished difference Result 408 states and 1268 transitions. [2021-10-24 10:29:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:29:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:29:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:29:08,885 INFO L225 Difference]: With dead ends: 408 [2021-10-24 10:29:08,886 INFO L226 Difference]: Without dead ends: 408 [2021-10-24 10:29:08,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-10-24 10:29:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-10-24 10:29:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 272. [2021-10-24 10:29:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.243542435424354) internal successors, (879), 271 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 879 transitions. [2021-10-24 10:29:08,901 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 879 transitions. Word has length 22 [2021-10-24 10:29:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:29:08,901 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 879 transitions. [2021-10-24 10:29:08,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 879 transitions. [2021-10-24 10:29:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:29:08,903 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:29:08,903 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 10:29:08,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-24 10:29:09,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-10-24 10:29:09,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:09,320 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 10:29:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:29:09,320 INFO L82 PathProgramCache]: Analyzing trace with hash -773883308, now seen corresponding path program 10 times [2021-10-24 10:29:09,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:29:09,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691149462] [2021-10-24 10:29:09,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:29:09,321 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:29:09,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:29:09,322 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:29:09,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-24 10:29:10,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:29:10,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:29:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:10,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:10,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:29:10,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691149462] [2021-10-24 10:29:10,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691149462] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:10,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1328290576] [2021-10-24 10:29:10,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:29:10,689 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:10,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:29:10,690 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:29:10,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-24 10:29:11,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:29:11,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:29:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:12,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:12,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1328290576] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:12,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139587405] [2021-10-24 10:29:12,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:29:12,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:29:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:29:12,274 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:29:12,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-24 10:29:13,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:29:13,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:29:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:13,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:13,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139587405] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:29:13,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 10:29:13,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7, 7, 8] total 36 [2021-10-24 10:29:13,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546469852] [2021-10-24 10:29:13,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:29:13,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:29:13,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:29:13,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-10-24 10:29:13,973 INFO L87 Difference]: Start difference. First operand 272 states and 879 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:29:14,367 INFO L93 Difference]: Finished difference Result 364 states and 1121 transitions. [2021-10-24 10:29:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:29:14,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:29:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:29:14,371 INFO L225 Difference]: With dead ends: 364 [2021-10-24 10:29:14,371 INFO L226 Difference]: Without dead ends: 360 [2021-10-24 10:29:14,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1154.3ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-10-24 10:29:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-24 10:29:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 274. [2021-10-24 10:29:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.238095238095238) internal successors, (884), 273 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 884 transitions. [2021-10-24 10:29:14,384 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 884 transitions. Word has length 22 [2021-10-24 10:29:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:29:14,384 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 884 transitions. [2021-10-24 10:29:14,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 884 transitions. [2021-10-24 10:29:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:29:14,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:29:14,387 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 10:29:14,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-24 10:29:14,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-10-24 10:29:14,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-10-24 10:29:15,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:15,006 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 10:29:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:29:15,007 INFO L82 PathProgramCache]: Analyzing trace with hash -818521500, now seen corresponding path program 11 times [2021-10-24 10:29:15,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:29:15,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723318360] [2021-10-24 10:29:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:29:15,008 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:29:15,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:29:15,009 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:29:15,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-24 10:29:15,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:29:15,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:15,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-24 10:29:15,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:16,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:16,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:29:16,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723318360] [2021-10-24 10:29:16,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723318360] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:16,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366695128] [2021-10-24 10:29:16,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:29:16,481 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:16,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:29:16,482 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:29:16,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-10-24 10:29:17,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:29:17,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:29:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:17,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:18,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1366695128] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:18,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326581304] [2021-10-24 10:29:18,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:29:18,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:29:18,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:29:18,337 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:29:18,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-24 10:29:19,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:29:19,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:19,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:29:19,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:19,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:19,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326581304] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:29:19,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 10:29:19,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 7, 7, 8] total 33 [2021-10-24 10:29:19,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015006881] [2021-10-24 10:29:19,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:29:19,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:29:19,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:29:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-10-24 10:29:19,972 INFO L87 Difference]: Start difference. First operand 274 states and 884 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:29:20,405 INFO L93 Difference]: Finished difference Result 362 states and 1116 transitions. [2021-10-24 10:29:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:29:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:29:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:29:20,420 INFO L225 Difference]: With dead ends: 362 [2021-10-24 10:29:20,420 INFO L226 Difference]: Without dead ends: 360 [2021-10-24 10:29:20,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1142.6ms TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-10-24 10:29:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-24 10:29:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-10-24 10:29:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.232727272727273) internal successors, (889), 275 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 889 transitions. [2021-10-24 10:29:20,434 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 889 transitions. Word has length 22 [2021-10-24 10:29:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:29:20,434 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 889 transitions. [2021-10-24 10:29:20,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 889 transitions. [2021-10-24 10:29:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:29:20,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:29:20,459 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 10:29:20,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-24 10:29:20,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-10-24 10:29:20,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-24 10:29:21,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:29:21,072 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 10:29:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:29:21,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1537448514, now seen corresponding path program 12 times [2021-10-24 10:29:21,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:29:21,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567158421] [2021-10-24 10:29:21,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 10:29:21,074 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:29:21,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:29:21,075 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:29:21,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-24 10:29:22,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 10:29:22,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:29:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:22,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:22,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:29:22,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567158421] [2021-10-24 10:29:22,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567158421] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:22,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1910121407] [2021-10-24 10:29:22,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 10:29:22,747 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:22,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:29:22,748 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:29:22,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-10-24 10:29:24,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 10:29:24,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:29:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:24,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:24,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1910121407] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:29:24,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:29:24,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-24 10:29:24,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727498238] [2021-10-24 10:29:24,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:29:24,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:29:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:29:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-10-24 10:29:24,489 INFO L87 Difference]: Start difference. First operand 276 states and 889 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:24,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:29:24,767 INFO L93 Difference]: Finished difference Result 348 states and 1088 transitions. [2021-10-24 10:29:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:29:24,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:29:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:29:24,771 INFO L225 Difference]: With dead ends: 348 [2021-10-24 10:29:24,771 INFO L226 Difference]: Without dead ends: 348 [2021-10-24 10:29:24,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-10-24 10:29:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-10-24 10:29:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 270. [2021-10-24 10:29:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2342007434944238) internal successors, (870), 269 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 870 transitions. [2021-10-24 10:29:24,783 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 870 transitions. Word has length 22 [2021-10-24 10:29:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:29:24,784 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 870 transitions. [2021-10-24 10:29:24,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 870 transitions. [2021-10-24 10:29:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:29:24,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:29:24,786 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 10:29:24,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-10-24 10:29:25,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2021-10-24 10:29:25,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:25,203 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 10:29:25,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:29:25,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1844052140, now seen corresponding path program 1 times [2021-10-24 10:29:25,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:29:25,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116481340] [2021-10-24 10:29:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:29:25,204 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:29:25,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:29:25,205 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:29:25,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-24 10:29:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:29:26,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:29:26,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:26,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:26,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:29:26,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116481340] [2021-10-24 10:29:26,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116481340] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:26,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1026018781] [2021-10-24 10:29:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:29:26,454 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:26,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:29:26,455 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:29:26,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-10-24 10:29:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:29:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:29:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:27,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:28,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1026018781] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:28,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803103325] [2021-10-24 10:29:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:29:28,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:29:28,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:29:28,051 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:29:28,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-24 10:29:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:29:29,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 10:29:29,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:29,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:29,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803103325] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:29:29,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:29:29,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5, 5, 5] total 20 [2021-10-24 10:29:29,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040095345] [2021-10-24 10:29:29,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 10:29:29,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:29:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 10:29:29,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-10-24 10:29:29,664 INFO L87 Difference]: Start difference. First operand 270 states and 870 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:29:30,155 INFO L93 Difference]: Finished difference Result 322 states and 971 transitions. [2021-10-24 10:29:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:29:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 10:29:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:29:30,158 INFO L225 Difference]: With dead ends: 322 [2021-10-24 10:29:30,158 INFO L226 Difference]: Without dead ends: 286 [2021-10-24 10:29:30,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-24 10:29:30,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-10-24 10:29:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 260. [2021-10-24 10:29:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.2316602316602316) internal successors, (837), 259 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 837 transitions. [2021-10-24 10:29:30,169 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 837 transitions. Word has length 22 [2021-10-24 10:29:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:29:30,170 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 837 transitions. [2021-10-24 10:29:30,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 837 transitions. [2021-10-24 10:29:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:29:30,172 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:29:30,172 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 10:29:30,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-24 10:29:30,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-24 10:29:30,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-10-24 10:29:30,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:30,798 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 10:29:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:29:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1406713312, now seen corresponding path program 2 times [2021-10-24 10:29:30,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:29:30,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133183133] [2021-10-24 10:29:30,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:29:30,799 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:29:30,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:29:30,800 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:29:30,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-24 10:29:31,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:29:31,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:29:31,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:32,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:32,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:29:32,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133183133] [2021-10-24 10:29:32,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133183133] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:29:32,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754167197] [2021-10-24 10:29:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:29:32,288 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:29:32,289 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:29:32,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-10-24 10:29:33,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:29:33,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:29:33,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:29:33,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:34,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:29:34,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754167197] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:29:34,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:29:34,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 4] total 12 [2021-10-24 10:29:34,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462095779] [2021-10-24 10:29:34,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:29:34,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:29:34,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:29:34,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:29:34,086 INFO L87 Difference]: Start difference. First operand 260 states and 837 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:29:34,172 INFO L93 Difference]: Finished difference Result 242 states and 774 transitions. [2021-10-24 10:29:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:29:34,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:29:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:29:34,175 INFO L225 Difference]: With dead ends: 242 [2021-10-24 10:29:34,175 INFO L226 Difference]: Without dead ends: 242 [2021-10-24 10:29:34,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:29:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-24 10:29:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 224. [2021-10-24 10:29:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.1704035874439462) internal successors, (707), 223 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 707 transitions. [2021-10-24 10:29:34,184 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 707 transitions. Word has length 22 [2021-10-24 10:29:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:29:34,184 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 707 transitions. [2021-10-24 10:29:34,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:29:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 707 transitions. [2021-10-24 10:29:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-24 10:29:34,186 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:29:34,186 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 10:29:34,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-10-24 10:29:34,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2021-10-24 10:29:34,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:34,604 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 10:29:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:29:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash 36518286, now seen corresponding path program 1 times [2021-10-24 10:29:34,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:29:34,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149244166] [2021-10-24 10:29:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:29:34,605 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:29:34,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:29:34,606 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:29:34,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-24 10:29:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:29:35,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-24 10:29:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:36,643 INFO L354 Elim1Store]: treesize reduction 262, result has 4.7 percent of original size [2021-10-24 10:29:36,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 37 [2021-10-24 10:29:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:29:36,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:29:37,241 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-24 10:29:37,241 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 77 treesize of output 61 [2021-10-24 10:29:45,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:29:45,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149244166] [2021-10-24 10:29:45,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-24 10:29:45,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1077530538] [2021-10-24 10:29:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:29:45,225 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:29:45,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:29:45,226 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:29:45,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-10-24 10:29:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:29:47,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-24 10:29:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:29:47,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:47,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:47,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:47,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 53 [2021-10-24 10:29:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:49,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:49,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:49,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:50,032 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-24 10:29:50,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 81 treesize of output 101 [2021-10-24 10:29:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:52,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:29:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:32:59,691 WARN L207 SmtUtils]: Spent 3.12 m on a formula simplification. DAG size of input: 347 DAG size of output: 126 [2021-10-24 10:32:59,692 INFO L354 Elim1Store]: treesize reduction 1645, result has 21.1 percent of original size [2021-10-24 10:32:59,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 119 treesize of output 495 [2021-10-24 10:39:08,654 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-24 10:39:08,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-24 10:39:08,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-24 10:39:08,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958627740] [2021-10-24 10:39:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:08,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:39:08,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:39:08,661 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:39:08,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-24 10:39:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:10,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-24 10:39:10,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:10,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-24 10:39:10,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:39:10,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-24 10:39:10,609 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-24 10:39:10,609 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-24 10:39:10,614 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:39:10,616 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-24 10:39:10,617 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-24 10:39:10,617 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-24 10:39:10,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-24 10:39:10,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-10-24 10:39:11,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:11,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4508885d-e690-4381-a07a-f302cb4f3e41/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:39:11,235 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-24 10:39:11,235 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:39:11,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:39:11 BasicIcfg [2021-10-24 10:39:11,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:39:11,256 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:39:11,256 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:39:11,257 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:39:11,257 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:28:03" (3/4) ... [2021-10-24 10:39:11,260 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 10:39:11,261 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:39:11,262 INFO L168 Benchmark]: Toolchain (without parser) took 668821.57 ms. Allocated memory was 58.7 MB in the beginning and 318.8 MB in the end (delta: 260.0 MB). Free memory was 36.3 MB in the beginning and 119.3 MB in the end (delta: -83.0 MB). Peak memory consumption was 176.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:11,262 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 58.7 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:39:11,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.53 ms. Allocated memory is still 58.7 MB. Free memory was 36.0 MB in the beginning and 40.3 MB in the end (delta: -4.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:11,263 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.99 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 38.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:39:11,263 INFO L168 Benchmark]: Boogie Preprocessor took 32.10 ms. Allocated memory is still 58.7 MB. Free memory was 38.4 MB in the beginning and 36.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:11,264 INFO L168 Benchmark]: RCFGBuilder took 670.47 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 36.7 MB in the beginning and 49.7 MB in the end (delta: -12.9 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:11,265 INFO L168 Benchmark]: TraceAbstraction took 667690.71 ms. Allocated memory was 71.3 MB in the beginning and 318.8 MB in the end (delta: 247.5 MB). Free memory was 49.4 MB in the beginning and 119.3 MB in the end (delta: -69.9 MB). Peak memory consumption was 177.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:11,265 INFO L168 Benchmark]: Witness Printer took 4.53 ms. Allocated memory is still 318.8 MB. Free memory is still 119.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:39:11,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 58.7 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 377.53 ms. Allocated memory is still 58.7 MB. Free memory was 36.0 MB in the beginning and 40.3 MB in the end (delta: -4.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.99 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 38.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.10 ms. Allocated memory is still 58.7 MB. Free memory was 38.4 MB in the beginning and 36.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 670.47 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 36.7 MB in the beginning and 49.7 MB in the end (delta: -12.9 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 667690.71 ms. Allocated memory was 71.3 MB in the beginning and 318.8 MB in the end (delta: 247.5 MB). Free memory was 49.4 MB in the beginning and 119.3 MB in the end (delta: -69.9 MB). Peak memory consumption was 177.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.53 ms. Allocated memory is still 318.8 MB. Free memory is still 119.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 13126.1ms, 141 PlacesBefore, 34 PlacesAfterwards, 143 TransitionsBefore, 28 TransitionsAfterwards, 1728 CoEnabledTransitionPairs, 7 FixpointIterations, 73 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 132 TotalNumberOfCompositions, 1798 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1639, positive: 1611, positive conditional: 0, positive unconditional: 1611, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1115, positive: 1107, positive conditional: 0, positive unconditional: 1107, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1115, positive: 1107, positive conditional: 0, positive unconditional: 1107, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 272, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 272, negative conditional: 0, negative unconditional: 272, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1639, positive: 504, positive conditional: 0, positive unconditional: 504, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 1115, unknown conditional: 0, unknown unconditional: 1115] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - 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 - UnprovableResult [Line: 90]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L41] 0 unsigned int* A; [L42] 0 unsigned int sum1, sum2, sum3; [L43] 0 int M, N; [L72] 0 pthread_t t1, t2, t3; [L75] 0 M = __VERIFIER_nondet_int() [L76] 0 N = __VERIFIER_nondet_int() [L38] COND FALSE 0 !(!cond) [L38] COND TRUE 0 !cond [L99] 0 unsigned int* arr = (unsigned int*)malloc(sizeof(unsigned int) * (size_t)size); [L100] 0 int i = 0; [L100] COND TRUE 0 i < size [L101] 0 arr[i] = __VERIFIER_nondet_int() [L100] 0 i++ [L103] 0 return arr; [L77] 0 A = create_fresh_uint_array(N) [L38] COND TRUE 0 !cond [L82] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L83] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L84] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L85] 0 \read(t1) [L64] 3 int i=M; [L64] COND TRUE 3 i