./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.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_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/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_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/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_cc64107f-1e8a-4ce7-a350-f17b808110e4/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 8388bb85ecdce58fe383ae596c701567afd6a093e23638ac37fc5f2186c4b3f8 ............................................................................................................................................ 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_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/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_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/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_cc64107f-1e8a-4ce7-a350-f17b808110e4/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 8388bb85ecdce58fe383ae596c701567afd6a093e23638ac37fc5f2186c4b3f8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:45:45,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:45:45,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:45:45,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:45:45,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:45:45,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:45:45,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:45:45,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:45:45,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:45:45,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:45:45,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:45:45,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:45:45,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:45:45,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:45:45,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:45:45,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:45:45,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:45:45,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:45:45,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:45:46,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:45:46,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:45:46,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:45:46,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:45:46,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:45:46,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:45:46,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:45:46,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:45:46,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:45:46,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:45:46,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:45:46,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:45:46,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:45:46,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:45:46,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:45:46,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:45:46,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:45:46,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:45:46,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:45:46,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:45:46,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:45:46,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:45:46,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:45:46,077 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:45:46,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:45:46,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:45:46,079 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:45:46,079 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:45:46,080 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:45:46,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:45:46,080 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:45:46,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:45:46,081 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:45:46,088 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:45:46,088 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:45:46,088 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:45:46,089 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:45:46,089 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:45:46,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:45:46,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:45:46,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:45:46,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:45:46,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:45:46,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:45:46,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:45:46,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:45:46,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:45:46,092 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:45:46,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:45:46,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:45:46,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:45:46,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:45:46,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:45:46,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:45:46,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:45:46,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:45:46,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:45:46,097 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:45:46,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:45:46,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:45:46,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:45:46,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:45:46,098 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_cc64107f-1e8a-4ce7-a350-f17b808110e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8388bb85ecdce58fe383ae596c701567afd6a093e23638ac37fc5f2186c4b3f8 [2021-10-24 10:45:46,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:45:46,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:45:46,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:45:46,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:45:46,427 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:45:46,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-24 10:45:46,532 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data/bc8c5ae6d/5a31ac1e6df34d238a05c4dcc1ac3ff6/FLAG4f8c05ed4 [2021-10-24 10:45:47,019 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:45:47,019 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-24 10:45:47,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data/bc8c5ae6d/5a31ac1e6df34d238a05c4dcc1ac3ff6/FLAG4f8c05ed4 [2021-10-24 10:45:47,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data/bc8c5ae6d/5a31ac1e6df34d238a05c4dcc1ac3ff6 [2021-10-24 10:45:47,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:45:47,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:45:47,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:45:47,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:45:47,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:45:47,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:45:47" (1/1) ... [2021-10-24 10:45:47,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1621f3f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:47, skipping insertion in model container [2021-10-24 10:45:47,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:45:47" (1/1) ... [2021-10-24 10:45:47,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:45:47,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:45:47,643 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_cc64107f-1e8a-4ce7-a350-f17b808110e4/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2423,2436] [2021-10-24 10:45:47,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:45:47,661 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 10:45:47,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@546d502b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:47, skipping insertion in model container [2021-10-24 10:45:47,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:45:47,663 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 10:45:47,665 INFO L168 Benchmark]: Toolchain (without parser) took 271.72 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 71.2 MB in the beginning and 99.2 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:45:47,666 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory is still 58.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:45:47,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.31 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 70.9 MB in the beginning and 99.8 MB in the end (delta: -28.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:45:47,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory is still 58.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.31 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 70.9 MB in the beginning and 99.8 MB in the end (delta: -28.9 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: 103]: 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 10:45:50,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:45:50,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:45:50,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:45:50,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:45:50,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:45:50,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:45:50,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:45:50,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:45:50,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:45:50,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:45:50,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:45:50,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:45:50,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:45:50,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:45:50,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:45:50,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:45:50,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:45:50,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:45:50,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:45:50,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:45:50,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:45:50,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:45:50,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:45:50,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:45:50,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:45:50,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:45:50,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:45:50,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:45:50,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:45:50,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:45:50,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:45:50,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:45:50,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:45:50,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:45:50,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:45:50,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:45:50,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:45:50,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:45:50,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:45:50,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:45:50,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 10:45:50,233 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:45:50,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:45:50,236 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:45:50,236 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:45:50,237 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:45:50,237 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:45:50,237 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:45:50,237 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:45:50,238 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:45:50,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:45:50,241 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:45:50,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:45:50,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:45:50,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:45:50,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:45:50,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:45:50,242 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:45:50,243 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 10:45:50,243 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 10:45:50,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:45:50,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:45:50,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:45:50,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:45:50,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:45:50,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 10:45:50,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:45:50,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:45:50,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:45:50,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:45:50,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:45:50,246 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 10:45:50,246 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 10:45:50,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:45:50,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:45:50,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:45:50,248 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_cc64107f-1e8a-4ce7-a350-f17b808110e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8388bb85ecdce58fe383ae596c701567afd6a093e23638ac37fc5f2186c4b3f8 [2021-10-24 10:45:50,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:45:50,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:45:50,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:45:50,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:45:50,745 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:45:50,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-24 10:45:50,825 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data/b87c731d4/9be2e0e1dbee44de8d48171da7435c0c/FLAG98d180246 [2021-10-24 10:45:51,429 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:45:51,430 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-24 10:45:51,441 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data/b87c731d4/9be2e0e1dbee44de8d48171da7435c0c/FLAG98d180246 [2021-10-24 10:45:51,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/data/b87c731d4/9be2e0e1dbee44de8d48171da7435c0c [2021-10-24 10:45:51,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:45:51,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:45:51,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:45:51,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:45:51,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:45:51,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:45:51" (1/1) ... [2021-10-24 10:45:51,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e5b9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:51, skipping insertion in model container [2021-10-24 10:45:51,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:45:51" (1/1) ... [2021-10-24 10:45:51,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:45:51,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:45:51,978 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_cc64107f-1e8a-4ce7-a350-f17b808110e4/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2423,2436] [2021-10-24 10:45:51,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:45:52,000 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 10:45:52,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:45:52,084 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_cc64107f-1e8a-4ce7-a350-f17b808110e4/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2423,2436] [2021-10-24 10:45:52,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:45:52,110 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:45:52,139 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_cc64107f-1e8a-4ce7-a350-f17b808110e4/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2423,2436] [2021-10-24 10:45:52,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:45:52,162 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:45:52,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52 WrapperNode [2021-10-24 10:45:52,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:45:52,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:45:52,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:45:52,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:45:52,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:45:52,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:45:52,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:45:52,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:45:52,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:45:52,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:45:52,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:45:52,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:45:52,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (1/1) ... [2021-10-24 10:45:52,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:45:52,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:45:52,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:45:52,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:45:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 10:45:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:45:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 10:45:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-24 10:45:52,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-24 10:45:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-24 10:45:52,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-24 10:45:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-24 10:45:52,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-24 10:45:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 10:45:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:45:52,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:45:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:45:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 10:45:52,402 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 10:45:52,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:45:52,983 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-24 10:45:52,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:45:52 BoogieIcfgContainer [2021-10-24 10:45:52,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:45:52,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:45:52,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:45:52,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:45:52,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:45:51" (1/3) ... [2021-10-24 10:45:52,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684b8dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:45:52, skipping insertion in model container [2021-10-24 10:45:52,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:45:52" (2/3) ... [2021-10-24 10:45:52,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684b8dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:45:52, skipping insertion in model container [2021-10-24 10:45:52,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:45:52" (3/3) ... [2021-10-24 10:45:52,993 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2021-10-24 10:45:53,023 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-24 10:45:53,024 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:45:53,024 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:45:53,024 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-24 10:45:53,093 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,094 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,094 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,094 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,094 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,095 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,095 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,095 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,096 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,096 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,097 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,097 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,098 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,098 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,098 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,098 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,099 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,099 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,100 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,100 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,100 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,101 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,101 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,101 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,102 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,102 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,105 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,106 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,106 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,106 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,107 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,107 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,107 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,107 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,107 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,108 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,108 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,108 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,109 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,109 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,110 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,110 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,112 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,113 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,113 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,114 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,114 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,114 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,115 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,115 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,115 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,115 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,115 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,116 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,116 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,117 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,117 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,117 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,118 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,118 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,119 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,120 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,120 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,120 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,120 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,120 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,121 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,121 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,121 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,122 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,122 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,122 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,122 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,123 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,123 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,123 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,123 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,123 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,124 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,125 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,127 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,128 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,128 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,129 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,129 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,130 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,130 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,130 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,130 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,136 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,136 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,137 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,142 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,142 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,142 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,143 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,143 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,149 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,149 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,149 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,149 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,149 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,154 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,154 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,154 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,154 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,155 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:45:53,169 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-24 10:45:53,227 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:45:53,244 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 10:45:53,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-24 10:45:53,269 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-24 10:45:53,280 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 170 transitions, 364 flow [2021-10-24 10:45:53,287 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 170 transitions, 364 flow [2021-10-24 10:45:53,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 170 transitions, 364 flow [2021-10-24 10:45:53,428 INFO L129 PetriNetUnfolder]: 16/167 cut-off events. [2021-10-24 10:45:53,428 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-24 10:45:53,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 167 events. 16/167 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 124 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 128. Up to 3 conditions per place. [2021-10-24 10:45:53,446 INFO L116 LiptonReduction]: Number of co-enabled transitions 1936 [2021-10-24 10:46:09,472 INFO L131 LiptonReduction]: Checked pairs total: 3021 [2021-10-24 10:46:09,472 INFO L133 LiptonReduction]: Total number of compositions: 153 [2021-10-24 10:46:09,483 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 34 transitions, 92 flow [2021-10-24 10:46:09,518 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 10:46:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 10:46:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:46:09,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:09,552 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 10:46:09,553 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 10:46:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:09,559 INFO L82 PathProgramCache]: Analyzing trace with hash -442512627, now seen corresponding path program 1 times [2021-10-24 10:46:09,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:09,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005087707] [2021-10-24 10:46:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:09,576 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:09,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:09,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:09,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 10:46:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:46:09,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:10,401 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 10:46:10,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:10,645 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 10:46:10,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:10,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005087707] [2021-10-24 10:46:10,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005087707] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:10,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:46:10,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-24 10:46:10,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441371914] [2021-10-24 10:46:10,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:46:10,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:10,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:46:10,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:46:10,675 INFO L87 Difference]: Start difference. First operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 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 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 10:46:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:10,941 INFO L93 Difference]: Finished difference Result 547 states and 1858 transitions. [2021-10-24 10:46:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:46:10,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 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 10:46:10,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:10,983 INFO L225 Difference]: With dead ends: 547 [2021-10-24 10:46:10,984 INFO L226 Difference]: Without dead ends: 524 [2021-10-24 10:46:10,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:46:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-10-24 10:46:11,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 328. [2021-10-24 10:46:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.458715596330275) internal successors, (1131), 327 states have internal predecessors, (1131), 0 states have call successors, (0), 0 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 10:46:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1131 transitions. [2021-10-24 10:46:11,081 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1131 transitions. Word has length 21 [2021-10-24 10:46:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:11,082 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1131 transitions. [2021-10-24 10:46:11,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 10:46:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1131 transitions. [2021-10-24 10:46:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:46:11,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:11,087 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 10:46:11,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:11,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:11,299 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 10:46:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:11,300 INFO L82 PathProgramCache]: Analyzing trace with hash -521645344, now seen corresponding path program 1 times [2021-10-24 10:46:11,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:11,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280641797] [2021-10-24 10:46:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:11,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:11,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:11,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 10:46:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:11,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:46:11,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:11,717 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 10:46:11,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:11,853 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 10:46:11,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:11,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280641797] [2021-10-24 10:46:11,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280641797] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:11,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:46:11,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 10:46:11,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491389762] [2021-10-24 10:46:11,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 10:46:11,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 10:46:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:46:11,856 INFO L87 Difference]: Start difference. First operand 328 states and 1131 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 10:46:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:12,323 INFO L93 Difference]: Finished difference Result 650 states and 2293 transitions. [2021-10-24 10:46:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 10:46:12,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 10:46:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:12,332 INFO L225 Difference]: With dead ends: 650 [2021-10-24 10:46:12,333 INFO L226 Difference]: Without dead ends: 648 [2021-10-24 10:46:12,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:46:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-10-24 10:46:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 408. [2021-10-24 10:46:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.533169533169533) internal successors, (1438), 407 states have internal predecessors, (1438), 0 states have call successors, (0), 0 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 10:46:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1438 transitions. [2021-10-24 10:46:12,371 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1438 transitions. Word has length 22 [2021-10-24 10:46:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:12,372 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1438 transitions. [2021-10-24 10:46:12,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 10:46:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1438 transitions. [2021-10-24 10:46:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:46:12,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:12,376 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 10:46:12,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:12,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:12,588 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 10:46:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash 788418064, now seen corresponding path program 2 times [2021-10-24 10:46:12,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:12,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638084765] [2021-10-24 10:46:12,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:46:12,590 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:12,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:12,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:12,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 10:46:12,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:46:12,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:12,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:46:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:13,000 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 10:46:13,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:13,143 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 10:46:13,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:13,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638084765] [2021-10-24 10:46:13,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638084765] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:13,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:46:13,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 10:46:13,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934059202] [2021-10-24 10:46:13,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 10:46:13,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 10:46:13,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:46:13,146 INFO L87 Difference]: Start difference. First operand 408 states and 1438 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 10:46:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:13,603 INFO L93 Difference]: Finished difference Result 736 states and 2650 transitions. [2021-10-24 10:46:13,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 10:46:13,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 22 [2021-10-24 10:46:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:13,612 INFO L225 Difference]: With dead ends: 736 [2021-10-24 10:46:13,612 INFO L226 Difference]: Without dead ends: 646 [2021-10-24 10:46:13,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:46:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-10-24 10:46:13,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 422. [2021-10-24 10:46:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.7600950118764844) internal successors, (1583), 421 states have internal predecessors, (1583), 0 states have call successors, (0), 0 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 10:46:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1583 transitions. [2021-10-24 10:46:13,660 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1583 transitions. Word has length 22 [2021-10-24 10:46:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:13,661 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1583 transitions. [2021-10-24 10:46:13,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 10:46:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1583 transitions. [2021-10-24 10:46:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:46:13,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:13,664 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, 1] [2021-10-24 10:46:13,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:13,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:13,876 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 10:46:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash 480776770, now seen corresponding path program 3 times [2021-10-24 10:46:13,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:13,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985701560] [2021-10-24 10:46:13,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:46:13,877 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:13,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:13,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 10:46:14,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:46:14,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:14,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:46:14,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:14,393 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 10:46:14,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:14,758 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 10:46:14,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:14,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985701560] [2021-10-24 10:46:14,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985701560] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:14,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [265133848] [2021-10-24 10:46:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:46:14,759 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:14,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:46:14,762 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:46:14,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-24 10:46:15,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:46:15,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:15,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:46:15,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:15,503 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 10:46:15,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:15,684 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 10:46:15,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [265133848] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:46:15,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:46:15,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 5] total 14 [2021-10-24 10:46:15,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692204323] [2021-10-24 10:46:15,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:46:15,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:15,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:46:15,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:46:15,686 INFO L87 Difference]: Start difference. First operand 422 states and 1583 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 10:46:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:15,963 INFO L93 Difference]: Finished difference Result 640 states and 2432 transitions. [2021-10-24 10:46:15,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:46:15,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 10:46:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:15,971 INFO L225 Difference]: With dead ends: 640 [2021-10-24 10:46:15,972 INFO L226 Difference]: Without dead ends: 640 [2021-10-24 10:46:15,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:46:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-10-24 10:46:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 432. [2021-10-24 10:46:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.7749419953596286) internal successors, (1627), 431 states have internal predecessors, (1627), 0 states have call successors, (0), 0 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 10:46:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1627 transitions. [2021-10-24 10:46:16,004 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1627 transitions. Word has length 22 [2021-10-24 10:46:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:16,005 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1627 transitions. [2021-10-24 10:46:16,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 10:46:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1627 transitions. [2021-10-24 10:46:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:46:16,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:16,008 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 10:46:16,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:16,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:16,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:16,411 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 10:46:16,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:16,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1995613428, now seen corresponding path program 4 times [2021-10-24 10:46:16,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:16,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841602425] [2021-10-24 10:46:16,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:46:16,412 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:16,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:16,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:16,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 10:46:16,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:46:16,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:16,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:46:16,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:16,819 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 10:46:16,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:16,959 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 10:46:16,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:16,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841602425] [2021-10-24 10:46:16,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841602425] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:16,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:46:16,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 10:46:16,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273104996] [2021-10-24 10:46:16,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 10:46:16,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:16,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 10:46:16,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:46:16,961 INFO L87 Difference]: Start difference. First operand 432 states and 1627 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 10:46:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:17,441 INFO L93 Difference]: Finished difference Result 884 states and 3170 transitions. [2021-10-24 10:46:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 10:46:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 22 [2021-10-24 10:46:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:17,452 INFO L225 Difference]: With dead ends: 884 [2021-10-24 10:46:17,452 INFO L226 Difference]: Without dead ends: 884 [2021-10-24 10:46:17,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:46:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-10-24 10:46:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 502. [2021-10-24 10:46:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.7904191616766467) internal successors, (1899), 501 states have internal predecessors, (1899), 0 states have call successors, (0), 0 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 10:46:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1899 transitions. [2021-10-24 10:46:17,485 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1899 transitions. Word has length 22 [2021-10-24 10:46:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:17,486 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1899 transitions. [2021-10-24 10:46:17,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 10:46:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1899 transitions. [2021-10-24 10:46:17,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:46:17,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:17,489 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 10:46:17,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-24 10:46:17,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:17,702 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 10:46:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1607163002, now seen corresponding path program 5 times [2021-10-24 10:46:17,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:17,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185493283] [2021-10-24 10:46:17,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:46:17,704 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:17,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:17,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:17,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 10:46:17,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:46:17,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:46:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:17,996 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 10:46:17,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:18,080 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 10:46:18,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:18,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185493283] [2021-10-24 10:46:18,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185493283] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:18,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:46:18,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-24 10:46:18,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472069125] [2021-10-24 10:46:18,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:46:18,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:18,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:46:18,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:46:18,083 INFO L87 Difference]: Start difference. First operand 502 states and 1899 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:46:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:18,372 INFO L93 Difference]: Finished difference Result 744 states and 2767 transitions. [2021-10-24 10:46:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:46:18,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-24 10:46:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:18,382 INFO L225 Difference]: With dead ends: 744 [2021-10-24 10:46:18,382 INFO L226 Difference]: Without dead ends: 744 [2021-10-24 10:46:18,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:46:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-10-24 10:46:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 484. [2021-10-24 10:46:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.739130434782609) internal successors, (1806), 483 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 10:46:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1806 transitions. [2021-10-24 10:46:18,417 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1806 transitions. Word has length 22 [2021-10-24 10:46:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:18,418 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1806 transitions. [2021-10-24 10:46:18,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:46:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1806 transitions. [2021-10-24 10:46:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:46:18,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:18,421 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 10:46:18,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-24 10:46:18,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:18,636 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 10:46:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:18,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2142857330, now seen corresponding path program 6 times [2021-10-24 10:46:18,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:18,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474680635] [2021-10-24 10:46:18,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 10:46:18,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:18,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:18,638 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:18,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 10:46:18,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 10:46:18,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:18,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:46:18,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:19,088 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 10:46:19,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:19,177 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 10:46:19,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:19,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474680635] [2021-10-24 10:46:19,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474680635] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:19,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:46:19,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 10:46:19,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333876473] [2021-10-24 10:46:19,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 10:46:19,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:19,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 10:46:19,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:46:19,180 INFO L87 Difference]: Start difference. First operand 484 states and 1806 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 10:46:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:19,606 INFO L93 Difference]: Finished difference Result 796 states and 2906 transitions. [2021-10-24 10:46:19,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 10:46:19,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 10:46:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:19,615 INFO L225 Difference]: With dead ends: 796 [2021-10-24 10:46:19,615 INFO L226 Difference]: Without dead ends: 792 [2021-10-24 10:46:19,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:46:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-10-24 10:46:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 512. [2021-10-24 10:46:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.7455968688845402) internal successors, (1914), 511 states have internal predecessors, (1914), 0 states have call successors, (0), 0 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 10:46:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1914 transitions. [2021-10-24 10:46:19,642 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1914 transitions. Word has length 22 [2021-10-24 10:46:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:19,643 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1914 transitions. [2021-10-24 10:46:19,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 10:46:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1914 transitions. [2021-10-24 10:46:19,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:46:19,646 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:19,646 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 10:46:19,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:19,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:19,867 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 10:46:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:19,868 INFO L82 PathProgramCache]: Analyzing trace with hash -642361992, now seen corresponding path program 7 times [2021-10-24 10:46:19,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:19,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078038749] [2021-10-24 10:46:19,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 10:46:19,868 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:19,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:19,869 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:19,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 10:46:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:20,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:46:20,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:20,274 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 10:46:20,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:20,385 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 10:46:20,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:20,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078038749] [2021-10-24 10:46:20,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078038749] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:20,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:46:20,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 10:46:20,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133974901] [2021-10-24 10:46:20,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 10:46:20,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:20,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 10:46:20,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:46:20,387 INFO L87 Difference]: Start difference. First operand 512 states and 1914 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 10:46:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:20,854 INFO L93 Difference]: Finished difference Result 948 states and 3409 transitions. [2021-10-24 10:46:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 10:46:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 10:46:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:20,864 INFO L225 Difference]: With dead ends: 948 [2021-10-24 10:46:20,865 INFO L226 Difference]: Without dead ends: 946 [2021-10-24 10:46:20,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:46:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-10-24 10:46:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 548. [2021-10-24 10:46:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.8446069469835464) internal successors, (2103), 547 states have internal predecessors, (2103), 0 states have call successors, (0), 0 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 10:46:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 2103 transitions. [2021-10-24 10:46:20,894 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 2103 transitions. Word has length 22 [2021-10-24 10:46:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:20,895 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 2103 transitions. [2021-10-24 10:46:20,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 10:46:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 2103 transitions. [2021-10-24 10:46:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:46:20,900 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:20,900 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 10:46:20,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:21,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:21,112 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 10:46:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1207793532, now seen corresponding path program 8 times [2021-10-24 10:46:21,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:21,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583465389] [2021-10-24 10:46:21,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:46:21,114 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:21,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:21,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:21,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 10:46:21,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:46:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:46:21,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:21,634 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 10:46:21,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:21,956 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 10:46:21,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:21,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583465389] [2021-10-24 10:46:21,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583465389] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:46:21,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:46:21,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2021-10-24 10:46:21,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352666578] [2021-10-24 10:46:21,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:46:21,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:46:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:46:21,958 INFO L87 Difference]: Start difference. First operand 548 states and 2103 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 10:46:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:22,172 INFO L93 Difference]: Finished difference Result 1000 states and 3685 transitions. [2021-10-24 10:46:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:46:22,173 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 10:46:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:22,183 INFO L225 Difference]: With dead ends: 1000 [2021-10-24 10:46:22,183 INFO L226 Difference]: Without dead ends: 1000 [2021-10-24 10:46:22,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:46:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-10-24 10:46:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 620. [2021-10-24 10:46:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.827140549273021) internal successors, (2369), 619 states have internal predecessors, (2369), 0 states have call successors, (0), 0 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 10:46:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2369 transitions. [2021-10-24 10:46:22,217 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2369 transitions. Word has length 22 [2021-10-24 10:46:22,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:22,218 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2369 transitions. [2021-10-24 10:46:22,218 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 10:46:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2369 transitions. [2021-10-24 10:46:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-24 10:46:22,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:22,221 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 10:46:22,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:22,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:22,438 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 10:46:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash 684748975, now seen corresponding path program 1 times [2021-10-24 10:46:22,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:22,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587478497] [2021-10-24 10:46:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:22,439 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:22,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:22,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:22,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-24 10:46:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:22,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:46:22,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:22,775 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 10:46:22,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:22,855 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 10:46:22,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:22,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587478497] [2021-10-24 10:46:22,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587478497] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:22,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:46:22,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-24 10:46:22,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436175903] [2021-10-24 10:46:22,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:46:22,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:22,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:46:22,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:46:22,857 INFO L87 Difference]: Start difference. First operand 620 states and 2369 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 10:46:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:22,906 INFO L93 Difference]: Finished difference Result 710 states and 2474 transitions. [2021-10-24 10:46:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:46:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-24 10:46:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:22,914 INFO L225 Difference]: With dead ends: 710 [2021-10-24 10:46:22,914 INFO L226 Difference]: Without dead ends: 670 [2021-10-24 10:46:22,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:46:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-10-24 10:46:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 588. [2021-10-24 10:46:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.5144804088586032) internal successors, (2063), 587 states have internal predecessors, (2063), 0 states have call successors, (0), 0 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 10:46:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 2063 transitions. [2021-10-24 10:46:22,939 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 2063 transitions. Word has length 23 [2021-10-24 10:46:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:22,939 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 2063 transitions. [2021-10-24 10:46:22,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 10:46:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 2063 transitions. [2021-10-24 10:46:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-24 10:46:22,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:22,944 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:46:22,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:23,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:23,157 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 10:46:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash -317342059, now seen corresponding path program 9 times [2021-10-24 10:46:23,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:23,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363440000] [2021-10-24 10:46:23,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:46:23,158 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:23,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:23,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:23,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-24 10:46:23,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:46:23,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 10:46:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:46:23,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:24,042 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 10:46:24,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:24,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363440000] [2021-10-24 10:46:24,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363440000] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:24,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1228013604] [2021-10-24 10:46:24,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:46:24,043 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:24,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:46:24,044 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:46:24,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-24 10:46:24,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:46:24,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:46:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:46:24,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:46:24,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1228013604] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:24,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:46:24,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 8] total 20 [2021-10-24 10:46:24,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451252168] [2021-10-24 10:46:24,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:46:24,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:24,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:46:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-10-24 10:46:24,952 INFO L87 Difference]: Start difference. First operand 588 states and 2063 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 10:46:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:25,219 INFO L93 Difference]: Finished difference Result 928 states and 3128 transitions. [2021-10-24 10:46:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:46:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 23 [2021-10-24 10:46:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:25,228 INFO L225 Difference]: With dead ends: 928 [2021-10-24 10:46:25,229 INFO L226 Difference]: Without dead ends: 902 [2021-10-24 10:46:25,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-10-24 10:46:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-10-24 10:46:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 758. [2021-10-24 10:46:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.4425363276089826) internal successors, (2606), 757 states have internal predecessors, (2606), 0 states have call successors, (0), 0 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 10:46:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2606 transitions. [2021-10-24 10:46:25,266 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2606 transitions. Word has length 23 [2021-10-24 10:46:25,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:25,266 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2606 transitions. [2021-10-24 10:46:25,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 10:46:25,267 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2606 transitions. [2021-10-24 10:46:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-24 10:46:25,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:25,270 INFO L512 BasicCegarLoop]: trace histogram [2, 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 10:46:25,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-10-24 10:46:25,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:25,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:25,674 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 10:46:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:25,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1447947773, now seen corresponding path program 1 times [2021-10-24 10:46:25,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:25,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127593247] [2021-10-24 10:46:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:25,675 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:25,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:25,676 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:25,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-24 10:46:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:25,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:46:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:46:26,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:46:26,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:26,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127593247] [2021-10-24 10:46:26,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127593247] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:46:26,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:46:26,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-10-24 10:46:26,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096614751] [2021-10-24 10:46:26,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:46:26,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:26,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:46:26,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:46:26,423 INFO L87 Difference]: Start difference. First operand 758 states and 2606 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:46:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:26,651 INFO L93 Difference]: Finished difference Result 866 states and 2897 transitions. [2021-10-24 10:46:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:46:26,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-24 10:46:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:26,657 INFO L225 Difference]: With dead ends: 866 [2021-10-24 10:46:26,658 INFO L226 Difference]: Without dead ends: 866 [2021-10-24 10:46:26,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:46:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-10-24 10:46:26,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 712. [2021-10-24 10:46:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.4444444444444446) internal successors, (2449), 711 states have internal predecessors, (2449), 0 states have call successors, (0), 0 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 10:46:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2449 transitions. [2021-10-24 10:46:26,684 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2449 transitions. Word has length 25 [2021-10-24 10:46:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:26,685 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2449 transitions. [2021-10-24 10:46:26,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:46:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2449 transitions. [2021-10-24 10:46:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-24 10:46:26,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:26,688 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:46:26,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:26,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:26,901 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 10:46:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:26,902 INFO L82 PathProgramCache]: Analyzing trace with hash 899465372, now seen corresponding path program 1 times [2021-10-24 10:46:26,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:26,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047975534] [2021-10-24 10:46:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:26,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:26,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:26,905 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:26,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-24 10:46:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:27,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:46:27,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:46:27,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:46:27,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:27,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047975534] [2021-10-24 10:46:27,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047975534] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:27,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1134249183] [2021-10-24 10:46:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:27,412 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:27,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:46:27,414 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:46:27,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-24 10:46:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:27,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:46:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:27,966 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 10:46:27,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:28,060 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 10:46:28,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1134249183] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:46:28,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:46:28,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 13 [2021-10-24 10:46:28,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283796977] [2021-10-24 10:46:28,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:46:28,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:28,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:46:28,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:46:28,062 INFO L87 Difference]: Start difference. First operand 712 states and 2449 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:46:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:28,227 INFO L93 Difference]: Finished difference Result 580 states and 1985 transitions. [2021-10-24 10:46:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:46:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-24 10:46:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:28,232 INFO L225 Difference]: With dead ends: 580 [2021-10-24 10:46:28,232 INFO L226 Difference]: Without dead ends: 544 [2021-10-24 10:46:28,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:46:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-10-24 10:46:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-10-24 10:46:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.5138121546961325) internal successors, (1908), 543 states have internal predecessors, (1908), 0 states have call successors, (0), 0 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 10:46:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1908 transitions. [2021-10-24 10:46:28,249 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1908 transitions. Word has length 26 [2021-10-24 10:46:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:28,249 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1908 transitions. [2021-10-24 10:46:28,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:46:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1908 transitions. [2021-10-24 10:46:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 10:46:28,252 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:28,252 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:46:28,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:28,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-10-24 10:46:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:28,665 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 10:46:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash -77237445, now seen corresponding path program 1 times [2021-10-24 10:46:28,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:28,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763117537] [2021-10-24 10:46:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:28,666 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:28,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:28,666 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:28,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-24 10:46:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:29,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:46:29,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:46:29,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:46:29,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:29,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763117537] [2021-10-24 10:46:29,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763117537] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:29,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [857183208] [2021-10-24 10:46:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:29,445 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:29,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:46:29,446 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:46:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-24 10:46:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:29,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:46:29,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:46:30,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:46:30,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [857183208] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:30,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046601773] [2021-10-24 10:46:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:30,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:46:30,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:46:30,368 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:46:30,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-24 10:46:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:46:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:46:31,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:46:31,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046601773] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:31,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:46:31,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5, 5, 9, 8] total 26 [2021-10-24 10:46:31,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50569978] [2021-10-24 10:46:31,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-24 10:46:31,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:31,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-24 10:46:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-10-24 10:46:31,416 INFO L87 Difference]: Start difference. First operand 544 states and 1908 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 10:46:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:33,507 INFO L93 Difference]: Finished difference Result 1657 states and 5714 transitions. [2021-10-24 10:46:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-24 10:46:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 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 27 [2021-10-24 10:46:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:33,519 INFO L225 Difference]: With dead ends: 1657 [2021-10-24 10:46:33,519 INFO L226 Difference]: Without dead ends: 1635 [2021-10-24 10:46:33,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1501.2ms TimeCoverageRelationStatistics Valid=1061, Invalid=2971, Unknown=0, NotChecked=0, Total=4032 [2021-10-24 10:46:33,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-10-24 10:46:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 553. [2021-10-24 10:46:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 3.324275362318841) internal successors, (1835), 552 states have internal predecessors, (1835), 0 states have call successors, (0), 0 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 10:46:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1835 transitions. [2021-10-24 10:46:33,562 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1835 transitions. Word has length 27 [2021-10-24 10:46:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:33,562 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 1835 transitions. [2021-10-24 10:46:33,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 10:46:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1835 transitions. [2021-10-24 10:46:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 10:46:33,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:33,566 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:46:33,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:33,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:33,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:34,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:34,179 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 10:46:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:34,180 INFO L82 PathProgramCache]: Analyzing trace with hash -830970449, now seen corresponding path program 1 times [2021-10-24 10:46:34,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:34,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356550142] [2021-10-24 10:46:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:34,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:34,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:34,181 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:34,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-24 10:46:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:46:34,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:34,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:34,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:34,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356550142] [2021-10-24 10:46:34,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356550142] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:34,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1709683773] [2021-10-24 10:46:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:34,826 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:34,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:46:34,828 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:46:34,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-24 10:46:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:46:35,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:35,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:35,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1709683773] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:35,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638607316] [2021-10-24 10:46:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:46:35,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:46:35,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:46:35,639 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:46:35,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-24 10:46:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:46:36,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:46:36,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:36,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:36,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638607316] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:36,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:46:36,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-24 10:46:36,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490864906] [2021-10-24 10:46:36,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:46:36,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:46:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:46:36,369 INFO L87 Difference]: Start difference. First operand 553 states and 1835 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:46:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:36,526 INFO L93 Difference]: Finished difference Result 865 states and 2871 transitions. [2021-10-24 10:46:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:46:36,527 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 10:46:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:36,532 INFO L225 Difference]: With dead ends: 865 [2021-10-24 10:46:36,532 INFO L226 Difference]: Without dead ends: 783 [2021-10-24 10:46:36,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:46:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-10-24 10:46:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 583. [2021-10-24 10:46:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.276632302405498) internal successors, (1907), 582 states have internal predecessors, (1907), 0 states have call successors, (0), 0 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 10:46:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1907 transitions. [2021-10-24 10:46:36,550 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1907 transitions. Word has length 29 [2021-10-24 10:46:36,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:36,550 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1907 transitions. [2021-10-24 10:46:36,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:46:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1907 transitions. [2021-10-24 10:46:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 10:46:36,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:36,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:46:36,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:36,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:36,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:37,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:37,160 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 10:46:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:37,160 INFO L82 PathProgramCache]: Analyzing trace with hash -835593661, now seen corresponding path program 2 times [2021-10-24 10:46:37,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:37,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871541906] [2021-10-24 10:46:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:46:37,160 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:37,170 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:37,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-24 10:46:37,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:46:37,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:46:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:37,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:37,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:37,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871541906] [2021-10-24 10:46:37,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871541906] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:37,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [618463830] [2021-10-24 10:46:37,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:46:37,867 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:46:37,869 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:46:37,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-24 10:46:38,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:46:38,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:46:38,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:38,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:38,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [618463830] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:38,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665164663] [2021-10-24 10:46:38,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:46:38,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:46:38,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:46:38,855 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:46:38,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-24 10:46:39,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:46:39,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:46:39,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:39,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:46:39,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665164663] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:39,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:46:39,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-24 10:46:39,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433160434] [2021-10-24 10:46:39,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:46:39,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:46:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:46:39,654 INFO L87 Difference]: Start difference. First operand 583 states and 1907 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 10:46:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:39,784 INFO L93 Difference]: Finished difference Result 729 states and 2363 transitions. [2021-10-24 10:46:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:46:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 10:46:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:39,789 INFO L225 Difference]: With dead ends: 729 [2021-10-24 10:46:39,789 INFO L226 Difference]: Without dead ends: 546 [2021-10-24 10:46:39,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:46:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-10-24 10:46:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 456. [2021-10-24 10:46:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.3582417582417583) internal successors, (1528), 455 states have internal predecessors, (1528), 0 states have call successors, (0), 0 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 10:46:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1528 transitions. [2021-10-24 10:46:39,806 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1528 transitions. Word has length 29 [2021-10-24 10:46:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:39,807 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1528 transitions. [2021-10-24 10:46:39,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 10:46:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1528 transitions. [2021-10-24 10:46:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-24 10:46:39,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:39,809 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:46:39,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:40,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-24 10:46:40,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-10-24 10:46:40,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:40,424 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 10:46:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1234597756, now seen corresponding path program 3 times [2021-10-24 10:46:40,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:40,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855984884] [2021-10-24 10:46:40,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:46:40,425 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:40,425 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:40,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-24 10:46:41,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:46:41,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:46:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:41,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:41,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:41,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855984884] [2021-10-24 10:46:41,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855984884] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:41,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2077841271] [2021-10-24 10:46:41,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:46:41,594 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:41,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:46:41,595 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:46:41,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-24 10:46:42,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:46:42,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:42,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:46:42,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:42,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:42,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2077841271] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:42,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766856642] [2021-10-24 10:46:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:46:42,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:46:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:46:42,826 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:46:42,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-24 10:46:43,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:46:43,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:46:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-24 10:46:43,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-24 10:46:44,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766856642] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:44,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:46:44,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 25 [2021-10-24 10:46:44,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279429173] [2021-10-24 10:46:44,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-24 10:46:44,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:44,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-24 10:46:44,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-10-24 10:46:44,094 INFO L87 Difference]: Start difference. First operand 456 states and 1528 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 10:46:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:46,051 INFO L93 Difference]: Finished difference Result 1238 states and 4276 transitions. [2021-10-24 10:46:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-24 10:46:46,052 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 0 states have call successors, (0), 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 34 [2021-10-24 10:46:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:46,064 INFO L225 Difference]: With dead ends: 1238 [2021-10-24 10:46:46,064 INFO L226 Difference]: Without dead ends: 1238 [2021-10-24 10:46:46,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1148.6ms TimeCoverageRelationStatistics Valid=502, Invalid=1660, Unknown=0, NotChecked=0, Total=2162 [2021-10-24 10:46:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-10-24 10:46:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 772. [2021-10-24 10:46:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.498054474708171) internal successors, (2697), 771 states have internal predecessors, (2697), 0 states have call successors, (0), 0 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 10:46:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2697 transitions. [2021-10-24 10:46:46,099 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2697 transitions. Word has length 34 [2021-10-24 10:46:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:46,100 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2697 transitions. [2021-10-24 10:46:46,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 10:46:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2697 transitions. [2021-10-24 10:46:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-24 10:46:46,104 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:46,104 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:46:46,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:46,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-24 10:46:46,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-24 10:46:46,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:46:46,709 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 10:46:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash -483684601, now seen corresponding path program 4 times [2021-10-24 10:46:46,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:46,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39526053] [2021-10-24 10:46:46,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:46:46,710 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:46,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:46,712 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:46,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-24 10:46:47,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:46:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:47,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:46:47,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:47,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:47,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:47,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39526053] [2021-10-24 10:46:47,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39526053] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:47,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [346792157] [2021-10-24 10:46:47,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:46:47,767 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:47,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:46:47,771 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:46:47,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-24 10:46:48,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:46:48,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:48,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:46:48,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:48,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:48,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [346792157] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:48,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143510670] [2021-10-24 10:46:48,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:46:48,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:46:48,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:46:48,915 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:46:48,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-24 10:46:49,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:46:49,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:49,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:46:49,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:49,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:49,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143510670] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:49,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:46:49,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-24 10:46:49,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306659723] [2021-10-24 10:46:49,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-24 10:46:49,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:46:49,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-24 10:46:49,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:46:49,881 INFO L87 Difference]: Start difference. First operand 772 states and 2697 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 10:46:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:46:50,414 INFO L93 Difference]: Finished difference Result 1208 states and 4163 transitions. [2021-10-24 10:46:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 10:46:50,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 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 37 [2021-10-24 10:46:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:46:50,423 INFO L225 Difference]: With dead ends: 1208 [2021-10-24 10:46:50,423 INFO L226 Difference]: Without dead ends: 1156 [2021-10-24 10:46:50,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:46:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-10-24 10:46:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 916. [2021-10-24 10:46:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.4852459016393444) internal successors, (3189), 915 states have internal predecessors, (3189), 0 states have call successors, (0), 0 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 10:46:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3189 transitions. [2021-10-24 10:46:50,465 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3189 transitions. Word has length 37 [2021-10-24 10:46:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:46:50,466 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3189 transitions. [2021-10-24 10:46:50,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 10:46:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3189 transitions. [2021-10-24 10:46:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-24 10:46:50,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:46:50,470 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:46:50,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-24 10:46:50,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-24 10:46:50,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-10-24 10:46:51,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:51,079 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 10:46:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:46:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1561102937, now seen corresponding path program 5 times [2021-10-24 10:46:51,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:46:51,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639258947] [2021-10-24 10:46:51,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:46:51,080 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:46:51,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:46:51,084 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:46:51,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-24 10:46:51,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-24 10:46:51,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:46:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:46:51,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:46:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:52,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:46:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:46:52,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:46:52,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639258947] [2021-10-24 10:46:52,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639258947] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:46:52,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1134275591] [2021-10-24 10:46:52,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:46:52,517 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:46:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:46:52,518 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:46:52,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-10-24 10:47:03,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-24 10:47:03,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:47:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:47:04,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:47:04,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-24 10:47:04,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1134275591] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:04,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840300225] [2021-10-24 10:47:04,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:47:04,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:47:04,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:47:04,934 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:47:04,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-24 10:47:09,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-24 10:47:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:47:09,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:47:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:47:09,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:47:09,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840300225] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:09,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:47:09,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 7, 7, 7] total 36 [2021-10-24 10:47:09,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659570714] [2021-10-24 10:47:09,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-24 10:47:09,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-24 10:47:09,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-10-24 10:47:09,946 INFO L87 Difference]: Start difference. First operand 916 states and 3189 transitions. Second operand has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:24,312 INFO L93 Difference]: Finished difference Result 4500 states and 16561 transitions. [2021-10-24 10:47:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-10-24 10:47:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-24 10:47:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:24,351 INFO L225 Difference]: With dead ends: 4500 [2021-10-24 10:47:24,351 INFO L226 Difference]: Without dead ends: 4382 [2021-10-24 10:47:24,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6779 ImplicationChecksByTransitivity, 10201.5ms TimeCoverageRelationStatistics Valid=2258, Invalid=17202, Unknown=0, NotChecked=0, Total=19460 [2021-10-24 10:47:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-10-24 10:47:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 1966. [2021-10-24 10:47:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 3.8030534351145038) internal successors, (7473), 1965 states have internal predecessors, (7473), 0 states have call successors, (0), 0 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 10:47:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7473 transitions. [2021-10-24 10:47:24,444 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7473 transitions. Word has length 37 [2021-10-24 10:47:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:24,445 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 7473 transitions. [2021-10-24 10:47:24,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7473 transitions. [2021-10-24 10:47:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-24 10:47:24,453 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:24,454 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:47:24,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:24,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:24,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:25,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:47:25,071 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 10:47:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:25,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1342717365, now seen corresponding path program 6 times [2021-10-24 10:47:25,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:25,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354960344] [2021-10-24 10:47:25,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 10:47:25,094 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:25,095 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:25,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-24 10:47:25,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-24 10:47:25,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:47:25,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:47:25,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:47:26,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:47:26,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:26,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354960344] [2021-10-24 10:47:26,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354960344] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:26,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1357858473] [2021-10-24 10:47:26,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 10:47:26,229 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:47:26,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:47:26,230 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:47:26,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-24 10:47:27,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-24 10:47:27,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:47:27,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:47:27,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:47:27,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:47:27,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1357858473] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:27,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389197921] [2021-10-24 10:47:27,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 10:47:27,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:47:27,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:47:27,598 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:47:27,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-24 10:47:28,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-24 10:47:28,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:47:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:47:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:47:28,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 10:47:28,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389197921] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:28,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:47:28,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-24 10:47:28,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458540281] [2021-10-24 10:47:28,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-24 10:47:28,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-24 10:47:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:47:28,779 INFO L87 Difference]: Start difference. First operand 1966 states and 7473 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 10:47:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:29,379 INFO L93 Difference]: Finished difference Result 2668 states and 9845 transitions. [2021-10-24 10:47:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-24 10:47:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 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 37 [2021-10-24 10:47:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:29,389 INFO L225 Difference]: With dead ends: 2668 [2021-10-24 10:47:29,390 INFO L226 Difference]: Without dead ends: 2592 [2021-10-24 10:47:29,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-10-24 10:47:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-10-24 10:47:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2080. [2021-10-24 10:47:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 3.775853775853776) internal successors, (7850), 2079 states have internal predecessors, (7850), 0 states have call successors, (0), 0 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 10:47:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 7850 transitions. [2021-10-24 10:47:29,493 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 7850 transitions. Word has length 37 [2021-10-24 10:47:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:29,493 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 7850 transitions. [2021-10-24 10:47:29,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 10:47:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 7850 transitions. [2021-10-24 10:47:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-24 10:47:29,502 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:29,502 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:47:29,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:29,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:29,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:30,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:47:30,119 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 10:47:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:30,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1435432906, now seen corresponding path program 7 times [2021-10-24 10:47:30,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:30,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438146679] [2021-10-24 10:47:30,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 10:47:30,120 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:30,122 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:30,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-24 10:47:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:30,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 10:47:30,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 10:47:31,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 10:47:31,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:31,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438146679] [2021-10-24 10:47:31,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438146679] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:31,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [990909513] [2021-10-24 10:47:31,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 10:47:31,903 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:47:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:47:31,904 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:47:31,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-10-24 10:47:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:47:33,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 10:47:33,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 10:47:33,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [990909513] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:33,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637529656] [2021-10-24 10:47:33,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 10:47:33,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:47:33,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:47:33,780 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:47:33,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-24 10:47:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:34,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 10:47:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 10:47:35,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-24 10:47:35,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637529656] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:35,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:47:35,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 14, 6] total 39 [2021-10-24 10:47:35,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676038670] [2021-10-24 10:47:35,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-24 10:47:35,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-24 10:47:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2021-10-24 10:47:35,876 INFO L87 Difference]: Start difference. First operand 2080 states and 7850 transitions. Second operand has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:49:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:49:11,961 INFO L93 Difference]: Finished difference Result 11140 states and 38411 transitions. [2021-10-24 10:49:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-10-24 10:49:11,963 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-24 10:49:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:49:12,036 INFO L225 Difference]: With dead ends: 11140 [2021-10-24 10:49:12,036 INFO L226 Difference]: Without dead ends: 10282 [2021-10-24 10:49:12,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52115 ImplicationChecksByTransitivity, 85625.5ms TimeCoverageRelationStatistics Valid=14433, Invalid=114089, Unknown=0, NotChecked=0, Total=128522 [2021-10-24 10:49:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10282 states. [2021-10-24 10:49:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10282 to 3460. [2021-10-24 10:49:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3459 states have (on average 3.7947383636889276) internal successors, (13126), 3459 states have internal predecessors, (13126), 0 states have call successors, (0), 0 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 10:49:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 13126 transitions. [2021-10-24 10:49:12,367 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 13126 transitions. Word has length 40 [2021-10-24 10:49:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:49:12,368 INFO L470 AbstractCegarLoop]: Abstraction has 3460 states and 13126 transitions. [2021-10-24 10:49:12,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:49:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 13126 transitions. [2021-10-24 10:49:12,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-24 10:49:12,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:49:12,380 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:49:12,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-24 10:49:12,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-24 10:49:12,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-10-24 10:49:13,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:49:13,003 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 10:49:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:49:13,003 INFO L82 PathProgramCache]: Analyzing trace with hash 247716386, now seen corresponding path program 8 times [2021-10-24 10:49:13,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:49:13,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531784899] [2021-10-24 10:49:13,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:49:13,004 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:49:13,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:49:13,005 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:49:13,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-24 10:49:14,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:49:14,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:49:14,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-24 10:49:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:49:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 10:49:14,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:49:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 10:49:16,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:49:16,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531784899] [2021-10-24 10:49:16,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531784899] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:49:16,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1874639823] [2021-10-24 10:49:16,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:49:16,636 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:49:16,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:49:16,637 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:49:16,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-10-24 10:49:17,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:49:17,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:49:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:49:18,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:49:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 10:49:18,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:49:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 10:49:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1874639823] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:49:19,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074490438] [2021-10-24 10:49:19,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:49:19,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:49:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:49:19,231 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:49:19,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-24 10:49:20,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:49:20,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:49:20,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-24 10:49:20,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:49:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-24 10:49:21,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:49:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-24 10:49:21,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074490438] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:49:21,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:49:21,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9, 9, 13, 7] total 51 [2021-10-24 10:49:21,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399035671] [2021-10-24 10:49:21,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-24 10:49:21,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:49:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-24 10:49:21,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2066, Unknown=0, NotChecked=0, Total=2550 [2021-10-24 10:49:21,704 INFO L87 Difference]: Start difference. First operand 3460 states and 13126 transitions. Second operand has 51 states, 51 states have (on average 3.764705882352941) internal successors, (192), 51 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 10:49:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:49:47,599 INFO L93 Difference]: Finished difference Result 17785 states and 65571 transitions. [2021-10-24 10:49:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-10-24 10:49:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.764705882352941) internal successors, (192), 51 states have internal predecessors, (192), 0 states have call successors, (0), 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 42 [2021-10-24 10:49:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:49:47,664 INFO L225 Difference]: With dead ends: 17785 [2021-10-24 10:49:47,665 INFO L226 Difference]: Without dead ends: 16821 [2021-10-24 10:49:47,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14574 ImplicationChecksByTransitivity, 22491.8ms TimeCoverageRelationStatistics Valid=7408, Invalid=34004, Unknown=0, NotChecked=0, Total=41412 [2021-10-24 10:49:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16821 states. [2021-10-24 10:49:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16821 to 6427. [2021-10-24 10:49:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6426 states have (on average 3.6864301276065983) internal successors, (23689), 6426 states have internal predecessors, (23689), 0 states have call successors, (0), 0 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 10:49:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 23689 transitions. [2021-10-24 10:49:48,122 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 23689 transitions. Word has length 42 [2021-10-24 10:49:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:49:48,122 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 23689 transitions. [2021-10-24 10:49:48,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.764705882352941) internal successors, (192), 51 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 10:49:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 23689 transitions. [2021-10-24 10:49:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-24 10:49:48,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:49:48,187 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:49:48,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-10-24 10:49:48,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-24 10:49:48,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-24 10:49:48,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:49:48,788 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 10:49:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:49:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash 156496880, now seen corresponding path program 9 times [2021-10-24 10:49:48,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:49:48,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674568397] [2021-10-24 10:49:48,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:49:48,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:49:48,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:49:48,791 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:49:48,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-24 10:49:50,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-24 10:49:50,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:49:50,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 10:49:50,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:49:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-24 10:49:50,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:49:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-24 10:49:51,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:49:51,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674568397] [2021-10-24 10:49:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674568397] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:49:51,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [708296578] [2021-10-24 10:49:51,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:49:51,205 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:49:51,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:49:51,206 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:49:51,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-10-24 10:49:52,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-24 10:49:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:49:52,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 10:49:52,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:49:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-24 10:49:53,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:49:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-24 10:49:53,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [708296578] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:49:53,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838169313] [2021-10-24 10:49:53,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:49:53,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:49:53,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:49:53,973 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:49:53,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-24 10:49:55,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-24 10:49:55,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:49:55,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-24 10:49:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:49:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-24 10:49:56,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:49:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-24 10:49:57,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838169313] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:49:57,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:49:57,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8, 8, 12, 12] total 44 [2021-10-24 10:49:57,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24246236] [2021-10-24 10:49:57,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-24 10:49:57,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:49:57,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-24 10:49:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-10-24 10:49:57,380 INFO L87 Difference]: Start difference. First operand 6427 states and 23689 transitions. Second operand has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 10:50:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:50:05,606 INFO L93 Difference]: Finished difference Result 16491 states and 62269 transitions. [2021-10-24 10:50:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-24 10:50:05,607 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 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 44 [2021-10-24 10:50:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:50:05,649 INFO L225 Difference]: With dead ends: 16491 [2021-10-24 10:50:05,649 INFO L226 Difference]: Without dead ends: 16491 [2021-10-24 10:50:05,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 5916.2ms TimeCoverageRelationStatistics Valid=1388, Invalid=6094, Unknown=0, NotChecked=0, Total=7482 [2021-10-24 10:50:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16491 states. [2021-10-24 10:50:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16491 to 8871. [2021-10-24 10:50:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8871 states, 8870 states have (on average 3.783652762119504) internal successors, (33561), 8870 states have internal predecessors, (33561), 0 states have call successors, (0), 0 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 10:50:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8871 states to 8871 states and 33561 transitions. [2021-10-24 10:50:06,054 INFO L78 Accepts]: Start accepts. Automaton has 8871 states and 33561 transitions. Word has length 44 [2021-10-24 10:50:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:50:06,054 INFO L470 AbstractCegarLoop]: Abstraction has 8871 states and 33561 transitions. [2021-10-24 10:50:06,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 10:50:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 8871 states and 33561 transitions. [2021-10-24 10:50:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-24 10:50:06,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:50:06,083 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:50:06,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-24 10:50:06,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-10-24 10:50:06,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2021-10-24 10:50:06,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:50:06,700 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 10:50:06,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:50:06,700 INFO L82 PathProgramCache]: Analyzing trace with hash 643400127, now seen corresponding path program 10 times [2021-10-24 10:50:06,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:50:06,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446195707] [2021-10-24 10:50:06,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:50:06,701 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:50:06,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:50:06,701 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:50:06,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-24 10:50:07,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:50:07,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:50:08,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:50:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:50:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:50:08,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:50:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:50:08,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:50:08,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446195707] [2021-10-24 10:50:08,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446195707] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:50:08,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1413233268] [2021-10-24 10:50:08,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:50:08,401 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:50:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:50:08,403 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:50:08,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-10-24 10:50:10,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:50:10,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:50:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:50:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:50:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:50:10,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:50:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:50:10,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1413233268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:50:10,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144661915] [2021-10-24 10:50:10,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:50:10,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:50:10,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:50:10,283 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:50:10,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-24 10:50:11,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:50:11,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:50:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:50:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:50:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:50:11,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:50:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-24 10:50:12,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144661915] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:50:12,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:50:12,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 12] total 34 [2021-10-24 10:50:12,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736851317] [2021-10-24 10:50:12,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-24 10:50:12,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:50:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-24 10:50:12,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-10-24 10:50:12,651 INFO L87 Difference]: Start difference. First operand 8871 states and 33561 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:51:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:56,516 INFO L93 Difference]: Finished difference Result 66577 states and 240081 transitions. [2021-10-24 10:51:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 601 states. [2021-10-24 10:51:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-24 10:51:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:56,884 INFO L225 Difference]: With dead ends: 66577 [2021-10-24 10:51:56,884 INFO L226 Difference]: Without dead ends: 63253 [2021-10-24 10:51:56,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182247 ImplicationChecksByTransitivity, 83185.4ms TimeCoverageRelationStatistics Valid=35551, Invalid=342059, Unknown=0, NotChecked=0, Total=377610 [2021-10-24 10:51:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63253 states. [2021-10-24 10:51:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63253 to 16347. [2021-10-24 10:51:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16347 states, 16346 states have (on average 4.056405236755169) internal successors, (66306), 16346 states have internal predecessors, (66306), 0 states have call successors, (0), 0 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 10:51:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16347 states to 16347 states and 66306 transitions. [2021-10-24 10:51:58,119 INFO L78 Accepts]: Start accepts. Automaton has 16347 states and 66306 transitions. Word has length 45 [2021-10-24 10:51:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:58,120 INFO L470 AbstractCegarLoop]: Abstraction has 16347 states and 66306 transitions. [2021-10-24 10:51:58,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:51:58,120 INFO L276 IsEmpty]: Start isEmpty. Operand 16347 states and 66306 transitions. [2021-10-24 10:51:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-24 10:51:58,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:58,186 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:58,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-10-24 10:51:58,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-10-24 10:51:58,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-24 10:51:58,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:51:58,792 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 10:51:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1774661145, now seen corresponding path program 11 times [2021-10-24 10:51:58,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:51:58,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491543447] [2021-10-24 10:51:58,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:51:58,793 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:51:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:51:58,795 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:51:58,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-24 10:52:00,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-24 10:52:00,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:52:00,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-24 10:52:00,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:52:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:52:00,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:52:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:52:01,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:52:01,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491543447] [2021-10-24 10:52:01,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491543447] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:52:01,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1190922691] [2021-10-24 10:52:01,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:52:01,360 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:52:01,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:52:01,361 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:52:01,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-10-24 10:52:32,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-24 10:52:32,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:52:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:52:32,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:52:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-24 10:52:33,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:52:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-24 10:52:34,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1190922691] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:52:34,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684596488] [2021-10-24 10:52:34,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 10:52:34,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:52:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:52:34,376 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:52:34,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-24 10:52:57,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-24 10:52:57,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:52:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 10:52:57,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:52:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:52:58,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:52:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:52:59,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684596488] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:52:59,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:52:59,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 11, 11, 12] total 57 [2021-10-24 10:52:59,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681029321] [2021-10-24 10:52:59,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-24 10:52:59,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:52:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-24 10:52:59,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2813, Unknown=0, NotChecked=0, Total=3192 [2021-10-24 10:52:59,372 INFO L87 Difference]: Start difference. First operand 16347 states and 66306 transitions. Second operand has 57 states, 57 states have (on average 2.508771929824561) internal successors, (143), 57 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 10:53:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:53:28,907 INFO L93 Difference]: Finished difference Result 44139 states and 175692 transitions. [2021-10-24 10:53:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-10-24 10:53:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.508771929824561) internal successors, (143), 57 states have internal predecessors, (143), 0 states have call successors, (0), 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 45 [2021-10-24 10:53:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:53:28,908 INFO L225 Difference]: With dead ends: 44139 [2021-10-24 10:53:28,908 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:53:28,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13653 ImplicationChecksByTransitivity, 22824.7ms TimeCoverageRelationStatistics Valid=5168, Invalid=36652, Unknown=0, NotChecked=0, Total=41820 [2021-10-24 10:53:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:53:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:53:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:53:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:53:28,911 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-10-24 10:53:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:53:28,911 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:53:28,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.508771929824561) internal successors, (143), 57 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 10:53:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:53:28,912 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:53:28,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:53:28,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-24 10:53:28,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-24 10:53:28,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-24 10:53:28,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-10-24 10:53:29,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-10-24 10:53:29,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-24 10:53:29,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:53:29,527 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-24 10:53:29,527 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:53:29,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:53:29 BasicIcfg [2021-10-24 10:53:29,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:53:29,530 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:53:29,530 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:53:29,530 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:53:29,531 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:45:52" (3/4) ... [2021-10-24 10:53:29,534 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:53:29,542 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-24 10:53:29,542 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-24 10:53:29,542 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-24 10:53:29,548 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-10-24 10:53:29,549 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-24 10:53:29,549 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:53:29,550 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:53:29,600 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:53:29,600 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:53:29,602 INFO L168 Benchmark]: Toolchain (without parser) took 457815.27 ms. Allocated memory was 58.7 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 36.7 MB in the beginning and 252.7 MB in the end (delta: -216.0 MB). Peak memory consumption was 878.0 MB. Max. memory is 16.1 GB. [2021-10-24 10:53:29,602 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 58.7 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:53:29,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.77 ms. Allocated memory is still 58.7 MB. Free memory was 36.6 MB in the beginning and 40.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:53:29,603 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.50 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 38.3 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:53:29,604 INFO L168 Benchmark]: Boogie Preprocessor took 87.47 ms. Allocated memory is still 58.7 MB. Free memory was 38.3 MB in the beginning and 36.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:53:29,604 INFO L168 Benchmark]: RCFGBuilder took 682.72 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 36.6 MB in the beginning and 58.3 MB in the end (delta: -21.7 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2021-10-24 10:53:29,605 INFO L168 Benchmark]: TraceAbstraction took 456541.99 ms. Allocated memory was 79.7 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 57.8 MB in the beginning and 256.9 MB in the end (delta: -199.1 MB). Peak memory consumption was 874.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:53:29,605 INFO L168 Benchmark]: Witness Printer took 70.26 ms. Allocated memory is still 1.2 GB. Free memory was 256.9 MB in the beginning and 252.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:53:29,608 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 58.7 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 376.77 ms. Allocated memory is still 58.7 MB. Free memory was 36.6 MB in the beginning and 40.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.50 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 38.3 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 87.47 ms. Allocated memory is still 58.7 MB. Free memory was 38.3 MB in the beginning and 36.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 682.72 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 36.6 MB in the beginning and 58.3 MB in the end (delta: -21.7 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 456541.99 ms. Allocated memory was 79.7 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 57.8 MB in the beginning and 256.9 MB in the end (delta: -199.1 MB). Peak memory consumption was 874.7 MB. Max. memory is 16.1 GB. * Witness Printer took 70.26 ms. Allocated memory is still 1.2 GB. Free memory was 256.9 MB in the beginning and 252.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 16185.4ms, 164 PlacesBefore, 38 PlacesAfterwards, 170 TransitionsBefore, 34 TransitionsAfterwards, 1936 CoEnabledTransitionPairs, 7 FixpointIterations, 91 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 6 ConcurrentYvCompositions, 10 ChoiceCompositions, 153 TotalNumberOfCompositions, 3021 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2234, positive: 2144, positive conditional: 0, positive unconditional: 2144, negative: 90, negative conditional: 0, negative unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1293, positive: 1269, positive conditional: 0, positive unconditional: 1269, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1293, positive: 1269, positive conditional: 0, positive unconditional: 1269, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 24, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1208, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1208, negative conditional: 0, negative unconditional: 1208, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2234, positive: 875, positive conditional: 0, positive unconditional: 875, negative: 66, negative conditional: 0, negative unconditional: 66, unknown: 1293, unknown conditional: 0, unknown unconditional: 1293] , Statistics on independence cache: Total cache size (in pairs): 114, Positive cache size: 106, Positive conditional cache size: 0, Positive unconditional cache size: 106, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 94]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 193 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 456301.0ms, OverallIterations: 25, TraceHistogramMax: 3, EmptinessCheckTime: 269.2ms, AutomataDifference: 288345.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16276.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2188 SDtfs, 10236 SDslu, 22209 SDs, 0 SdLazy, 32594 SolverSat, 1953 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52851.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5373 GetRequests, 3462 SyntacticMatches, 1 SemanticMatches, 1910 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273361 ImplicationChecksByTransitivity, 235706.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16347occurred in iteration=24, InterpolantAutomatonStates: 1631, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3138.7ms AutomataMinimizationTime, 25 MinimizatonAttempts, 79696 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 785.3ms SsaConstructionTime, 72850.2ms SatisfiabilityAnalysisTime, 32186.8ms InterpolantComputationTime, 1703 NumberOfCodeBlocks, 1685 NumberOfCodeBlocksAsserted, 99 NumberOfCheckSat, 3302 ConstructedInterpolants, 8 QuantifiedInterpolants, 15988 SizeOfPredicates, 222 NumberOfNonLiveVariables, 6805 ConjunctsInSsa, 508 ConjunctsInUnsatCore, 104 InterpolantComputations, 23 PerfectInterpolantSequences, 991/1556 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-24 10:53:29,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64107f-1e8a-4ce7-a350-f17b808110e4/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...