./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF --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 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:34,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:34,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:34,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:34,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:34,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:34,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:34,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:34,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:34,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:34,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:34,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:34,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:34,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:34,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:34,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:34,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:34,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:34,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:34,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:35,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:35,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:35,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:35,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:35,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:35,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:35,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:35,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:35,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:35,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:35,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:35,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:35,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:35,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:35,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:35,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:35,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:35,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:35,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:35,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:35,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:35,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:49:35,050 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:35,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:35,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:35,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:35,052 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:35,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:35,053 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:35,053 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:49:35,053 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:35,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:35,053 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:49:35,054 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:49:35,054 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:35,054 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:49:35,054 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:49:35,055 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:49:35,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:35,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:49:35,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:49:35,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:49:35,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:35,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:49:35,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:35,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:49:35,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:35,057 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:49:35,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:49:35,058 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:35,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:49:35,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:35,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:35,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:35,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:35,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:35,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:49:35,060 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:49:35,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:49:35,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:49:35,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:35,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:35,061 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_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 [2021-11-12 22:49:35,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:49:35,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:49:35,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:49:35,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:49:35,407 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:49:35,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2021-11-12 22:49:35,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data/5373c99bb/b7cefe2516f4401d93552679533ec4e5/FLAG234e0358b [2021-11-12 22:49:36,168 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:49:36,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2021-11-12 22:49:36,178 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data/5373c99bb/b7cefe2516f4401d93552679533ec4e5/FLAG234e0358b [2021-11-12 22:49:36,517 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data/5373c99bb/b7cefe2516f4401d93552679533ec4e5 [2021-11-12 22:49:36,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:49:36,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:49:36,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:36,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:49:36,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:49:36,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:36" (1/1) ... [2021-11-12 22:49:36,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad5069b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:36, skipping insertion in model container [2021-11-12 22:49:36,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:36" (1/1) ... [2021-11-12 22:49:36,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:49:36,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:36,888 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_9190fc6c-55de-4211-aa72-bde026edd319/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2021-11-12 22:49:36,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:36,918 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) [2021-11-12 22:49:36,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b12cb6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:36, skipping insertion in model container [2021-11-12 22:49:36,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:36,920 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:49:36,923 INFO L158 Benchmark]: Toolchain (without parser) took 398.17ms. Allocated memory is still 130.0MB. Free memory was 94.1MB in the beginning and 104.7MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:49:36,924 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory was 62.4MB in the beginning and 62.4MB in the end (delta: 24.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:49:36,924 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.99ms. Allocated memory is still 130.0MB. Free memory was 94.1MB in the beginning and 104.7MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:49:36,926 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory was 62.4MB in the beginning and 62.4MB in the end (delta: 24.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 394.99ms. Allocated memory is still 130.0MB. Free memory was 94.1MB in the beginning and 104.7MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 161]: 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF --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 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:39,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:39,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:39,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:39,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:39,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:39,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:39,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:39,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:39,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:39,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:39,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:39,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:39,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:39,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:39,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:39,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:39,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:39,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:39,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:39,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:39,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:39,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:39,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:39,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:39,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:39,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:39,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:39,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:39,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:39,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:39,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:39,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:39,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:39,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:39,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:39,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:39,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:39,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:39,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:39,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:39,646 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:49:39,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:39,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:39,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:39,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:39,718 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:39,718 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:39,719 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:39,719 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:39,719 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:39,719 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:39,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:39,723 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:49:39,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:49:39,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:39,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:49:39,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:39,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:49:39,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:39,724 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:49:39,725 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:49:39,725 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:49:39,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:49:39,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:39,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:49:39,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:39,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:49:39,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:39,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:39,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:39,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:39,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:49:39,728 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:49:39,728 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:49:39,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:49:39,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:39,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:39,729 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_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 [2021-11-12 22:49:40,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:49:40,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:49:40,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:49:40,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:49:40,193 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:49:40,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2021-11-12 22:49:40,286 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data/1f5f1c389/4e724aca176741d792de9678f805aec4/FLAG072a716a1 [2021-11-12 22:49:40,996 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:49:40,996 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2021-11-12 22:49:41,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data/1f5f1c389/4e724aca176741d792de9678f805aec4/FLAG072a716a1 [2021-11-12 22:49:41,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/data/1f5f1c389/4e724aca176741d792de9678f805aec4 [2021-11-12 22:49:41,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:49:41,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:49:41,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:41,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:49:41,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:49:41,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334d6d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41, skipping insertion in model container [2021-11-12 22:49:41,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:49:41,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:41,588 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_9190fc6c-55de-4211-aa72-bde026edd319/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2021-11-12 22:49:41,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:41,682 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:49:41,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:41,715 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_9190fc6c-55de-4211-aa72-bde026edd319/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2021-11-12 22:49:41,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:41,728 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:49:41,764 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_9190fc6c-55de-4211-aa72-bde026edd319/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2021-11-12 22:49:41,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:41,788 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:49:41,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41 WrapperNode [2021-11-12 22:49:41,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:41,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:41,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:49:41,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:49:41,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:41,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:49:41,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:49:41,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:49:41,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:49:41,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:49:41,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:49:41,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:49:41,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:41,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:41,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:49:41,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:49:41,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:49:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:49:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:49:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:49:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-12 22:49:41,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-12 22:49:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-12 22:49:41,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-12 22:49:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-12 22:49:41,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-12 22:49:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-12 22:49:41,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-12 22:49:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-12 22:49:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-12 22:49:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:49:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:49:41,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:49:41,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:49:41,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:49:41,993 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-12 22:49:43,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:49:43,206 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-12 22:49:43,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:43 BoogieIcfgContainer [2021-11-12 22:49:43,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:49:43,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:49:43,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:49:43,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:49:43,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:49:41" (1/3) ... [2021-11-12 22:49:43,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47909752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:43, skipping insertion in model container [2021-11-12 22:49:43,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (2/3) ... [2021-11-12 22:49:43,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47909752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:43, skipping insertion in model container [2021-11-12 22:49:43,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:43" (3/3) ... [2021-11-12 22:49:43,225 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2021-11-12 22:49:43,231 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-12 22:49:43,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:49:43,232 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:49:43,232 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-12 22:49:43,289 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,290 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,290 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,290 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,290 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,291 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,291 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,291 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,291 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,292 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,292 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,292 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,292 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,293 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,293 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,293 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,293 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,294 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,294 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,294 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,294 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,295 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,295 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,295 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,296 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,296 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,296 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,296 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,297 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,297 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,297 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,297 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,298 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,298 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,298 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,298 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,298 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,299 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,299 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,299 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,299 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,300 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,300 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,300 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,301 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,301 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,301 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,301 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,302 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,302 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,302 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,302 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,303 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,303 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,303 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,303 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,303 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,304 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,304 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,304 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,304 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,304 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,305 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,305 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,305 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,306 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,306 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,306 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,306 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,306 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,307 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,307 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,307 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,307 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,308 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,308 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,308 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,309 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,309 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,309 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,309 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,310 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,310 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,310 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,310 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,311 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,311 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,311 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,311 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,311 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,312 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,312 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,312 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,312 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,312 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,313 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,313 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,313 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,314 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,314 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,314 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,314 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,314 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,315 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,315 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,315 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,315 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,316 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,319 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,319 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,319 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,321 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,321 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,321 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,321 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~cond~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,321 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,322 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,322 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,322 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,322 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,323 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,325 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,325 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,325 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,326 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,326 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,326 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,326 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,327 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,327 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,327 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,327 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_~cond~3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,328 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,328 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,328 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,328 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,328 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,331 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:49:43,332 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-12 22:49:43,382 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:49:43,390 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 [2021-11-12 22:49:43,390 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-12 22:49:43,409 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-12 22:49:43,425 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 223 transitions, 478 flow [2021-11-12 22:49:43,428 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 223 transitions, 478 flow [2021-11-12 22:49:43,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 218 places, 223 transitions, 478 flow [2021-11-12 22:49:43,534 INFO L129 PetriNetUnfolder]: 18/219 cut-off events. [2021-11-12 22:49:43,534 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-12 22:49:43,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 219 events. 18/219 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 180. Up to 2 conditions per place. [2021-11-12 22:49:43,547 INFO L116 LiptonReduction]: Number of co-enabled transitions 2000 [2021-11-12 22:50:12,913 WARN L227 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 159 DAG size of output: 156 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-12 22:50:14,848 INFO L131 LiptonReduction]: Checked pairs total: 4258 [2021-11-12 22:50:14,849 INFO L133 LiptonReduction]: Total number of compositions: 217 [2021-11-12 22:50:14,858 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 116 flow [2021-11-12 22:50:14,937 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 854 states, 853 states have (on average 4.173505275498242) internal successors, (3560), 853 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 854 states, 853 states have (on average 4.173505275498242) internal successors, (3560), 853 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 22:50:14,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:14,970 INFO L514 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] [2021-11-12 22:50:14,971 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:14,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1655862042, now seen corresponding path program 1 times [2021-11-12 22:50:14,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:14,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857794170] [2021-11-12 22:50:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:14,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:14,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:14,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:15,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:50:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:15,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:50:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:15,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:15,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:15,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857794170] [2021-11-12 22:50:15,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857794170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:15,502 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:15,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-12 22:50:15,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69446612] [2021-11-12 22:50:15,504 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:15,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:50:15,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:50:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:50:15,571 INFO L87 Difference]: Start difference. First operand has 854 states, 853 states have (on average 4.173505275498242) internal successors, (3560), 853 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:15,888 INFO L93 Difference]: Finished difference Result 1261 states and 5285 transitions. [2021-11-12 22:50:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:50:15,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2021-11-12 22:50:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:15,928 INFO L225 Difference]: With dead ends: 1261 [2021-11-12 22:50:15,928 INFO L226 Difference]: Without dead ends: 1216 [2021-11-12 22:50:15,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:50:15,933 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 210.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 249.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:15,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 249.16ms Time] [2021-11-12 22:50:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-11-12 22:50:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2021-11-12 22:50:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 4.195884773662551) internal successors, (5098), 1215 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 5098 transitions. [2021-11-12 22:50:16,126 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 5098 transitions. Word has length 27 [2021-11-12 22:50:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:16,128 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 5098 transitions. [2021-11-12 22:50:16,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 5098 transitions. [2021-11-12 22:50:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-12 22:50:16,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:16,137 INFO L514 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] [2021-11-12 22:50:16,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:16,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:16,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:16,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1983621928, now seen corresponding path program 1 times [2021-11-12 22:50:16,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:16,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210150650] [2021-11-12 22:50:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:16,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:16,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:16,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:16,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:50:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:16,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:50:16,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:16,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:16,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:16,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210150650] [2021-11-12 22:50:16,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210150650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:16,948 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:16,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-12 22:50:16,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515066837] [2021-11-12 22:50:16,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:16,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:16,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:16,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:16,951 INFO L87 Difference]: Start difference. First operand 1216 states and 5098 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:17,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:17,257 INFO L93 Difference]: Finished difference Result 1654 states and 6690 transitions. [2021-11-12 22:50:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:50:17,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-12 22:50:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:17,282 INFO L225 Difference]: With dead ends: 1654 [2021-11-12 22:50:17,282 INFO L226 Difference]: Without dead ends: 1618 [2021-11-12 22:50:17,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:17,284 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 223.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 259.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:17,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 8 Invalid, 57 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 259.91ms Time] [2021-11-12 22:50:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-11-12 22:50:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1504. [2021-11-12 22:50:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 4.125083166999334) internal successors, (6200), 1503 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 6200 transitions. [2021-11-12 22:50:17,401 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 6200 transitions. Word has length 29 [2021-11-12 22:50:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:17,401 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 6200 transitions. [2021-11-12 22:50:17,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 6200 transitions. [2021-11-12 22:50:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-12 22:50:17,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:17,410 INFO L514 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] [2021-11-12 22:50:17,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:17,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:17,628 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:17,629 INFO L85 PathProgramCache]: Analyzing trace with hash -341646937, now seen corresponding path program 1 times [2021-11-12 22:50:17,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:17,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186744431] [2021-11-12 22:50:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:17,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:17,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:17,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:17,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:50:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:17,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:50:17,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:17,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:18,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:18,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186744431] [2021-11-12 22:50:18,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186744431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:18,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:18,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-12 22:50:18,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334491720] [2021-11-12 22:50:18,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:18,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:18,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:18,088 INFO L87 Difference]: Start difference. First operand 1504 states and 6200 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 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) [2021-11-12 22:50:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:18,394 INFO L93 Difference]: Finished difference Result 1954 states and 7729 transitions. [2021-11-12 22:50:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:50:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 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 29 [2021-11-12 22:50:18,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:18,419 INFO L225 Difference]: With dead ends: 1954 [2021-11-12 22:50:18,419 INFO L226 Difference]: Without dead ends: 1888 [2021-11-12 22:50:18,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:18,423 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 266.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:18,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 8 Invalid, 59 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 266.05ms Time] [2021-11-12 22:50:18,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-11-12 22:50:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1732. [2021-11-12 22:50:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 4.056036972848065) internal successors, (7021), 1731 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 7021 transitions. [2021-11-12 22:50:18,561 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 7021 transitions. Word has length 29 [2021-11-12 22:50:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:18,561 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 7021 transitions. [2021-11-12 22:50:18,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 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) [2021-11-12 22:50:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 7021 transitions. [2021-11-12 22:50:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 22:50:18,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:18,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:18,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:18,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:18,786 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash 226263611, now seen corresponding path program 1 times [2021-11-12 22:50:18,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:18,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138030699] [2021-11-12 22:50:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:18,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:18,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:18,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:18,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:50:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:50:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:19,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:19,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:19,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138030699] [2021-11-12 22:50:19,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138030699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:19,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1942668271] [2021-11-12 22:50:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:19,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:19,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:19,270 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:19,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 22:50:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:50:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:19,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:19,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1942668271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:19,886 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:50:19,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-12 22:50:19,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222714792] [2021-11-12 22:50:19,886 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:19,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:50:19,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:50:19,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:50:19,888 INFO L87 Difference]: Start difference. First operand 1732 states and 7021 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:20,298 INFO L93 Difference]: Finished difference Result 2460 states and 9547 transitions. [2021-11-12 22:50:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:20,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 31 [2021-11-12 22:50:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:20,327 INFO L225 Difference]: With dead ends: 2460 [2021-11-12 22:50:20,328 INFO L226 Difference]: Without dead ends: 2358 [2021-11-12 22:50:20,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:50:20,329 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 306.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 354.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:20,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 18 Invalid, 94 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 354.84ms Time] [2021-11-12 22:50:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-11-12 22:50:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2128. [2021-11-12 22:50:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 4.017865538316879) internal successors, (8546), 2127 states have internal predecessors, (8546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 8546 transitions. [2021-11-12 22:50:20,494 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 8546 transitions. Word has length 31 [2021-11-12 22:50:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:20,495 INFO L470 AbstractCegarLoop]: Abstraction has 2128 states and 8546 transitions. [2021-11-12 22:50:20,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 8546 transitions. [2021-11-12 22:50:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 22:50:20,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:20,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:20,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:20,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:20,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:20,915 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:20,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash -118072285, now seen corresponding path program 1 times [2021-11-12 22:50:20,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:20,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324577779] [2021-11-12 22:50:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:20,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:20,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:20,918 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:20,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:50:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:21,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:50:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:21,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:21,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:21,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324577779] [2021-11-12 22:50:21,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324577779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:21,375 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:21,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:50:21,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983111114] [2021-11-12 22:50:21,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:21,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:50:21,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:50:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:50:21,378 INFO L87 Difference]: Start difference. First operand 2128 states and 8546 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:21,778 INFO L93 Difference]: Finished difference Result 2893 states and 11163 transitions. [2021-11-12 22:50:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:21,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 31 [2021-11-12 22:50:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:21,812 INFO L225 Difference]: With dead ends: 2893 [2021-11-12 22:50:21,813 INFO L226 Difference]: Without dead ends: 2756 [2021-11-12 22:50:21,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:50:21,814 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 371.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:21,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 24 Invalid, 131 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 371.62ms Time] [2021-11-12 22:50:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-11-12 22:50:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2444. [2021-11-12 22:50:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 3.9975440032746623) internal successors, (9766), 2443 states have internal predecessors, (9766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 9766 transitions. [2021-11-12 22:50:21,992 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 9766 transitions. Word has length 31 [2021-11-12 22:50:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:21,992 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 9766 transitions. [2021-11-12 22:50:21,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 9766 transitions. [2021-11-12 22:50:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:22,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:22,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:22,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:22,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:22,203 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1276858921, now seen corresponding path program 1 times [2021-11-12 22:50:22,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:22,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046677084] [2021-11-12 22:50:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:22,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:22,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:22,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:22,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:50:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:22,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:50:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:22,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:23,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:23,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046677084] [2021-11-12 22:50:23,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046677084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:23,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [142021223] [2021-11-12 22:50:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:23,418 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:23,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:23,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:23,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 22:50:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:23,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:50:23,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:24,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:24,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [142021223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:24,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914046421] [2021-11-12 22:50:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:24,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:24,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:50:24,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 22:50:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:50:24,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:24,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:25,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914046421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:25,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:50:25,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-12 22:50:25,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156528628] [2021-11-12 22:50:25,198 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:50:25,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:50:25,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:50:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:50:25,200 INFO L87 Difference]: Start difference. First operand 2444 states and 9766 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:29,667 INFO L93 Difference]: Finished difference Result 7350 states and 29439 transitions. [2021-11-12 22:50:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 22:50:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:50:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:29,737 INFO L225 Difference]: With dead ends: 7350 [2021-11-12 22:50:29,737 INFO L226 Difference]: Without dead ends: 6628 [2021-11-12 22:50:29,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 22:50:29,738 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 419 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3169.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.15ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3663.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:29,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1 Invalid, 1488 Unknown, 0 Unchecked, 14.15ms Time], IncrementalHoareTripleChecker [28 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 3663.49ms Time] [2021-11-12 22:50:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2021-11-12 22:50:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 2438. [2021-11-12 22:50:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2437 states have (on average 4.003282724661469) internal successors, (9756), 2437 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 9756 transitions. [2021-11-12 22:50:29,987 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 9756 transitions. Word has length 32 [2021-11-12 22:50:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:29,987 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 9756 transitions. [2021-11-12 22:50:29,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:29,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 9756 transitions. [2021-11-12 22:50:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:29,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:29,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:30,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:30,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 22:50:30,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:30,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:30,603 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:30,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:30,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1192871517, now seen corresponding path program 2 times [2021-11-12 22:50:30,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:30,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431139551] [2021-11-12 22:50:30,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:50:30,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:30,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:30,608 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:30,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:50:30,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:50:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:30,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:30,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:31,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:31,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:31,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431139551] [2021-11-12 22:50:31,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431139551] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:50:31,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:50:31,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-12 22:50:31,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728159630] [2021-11-12 22:50:31,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:31,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:50:31,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:31,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:50:31,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:50:31,686 INFO L87 Difference]: Start difference. First operand 2438 states and 9756 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:33,348 INFO L93 Difference]: Finished difference Result 4394 states and 16729 transitions. [2021-11-12 22:50:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:50:33,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:50:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:33,373 INFO L225 Difference]: With dead ends: 4394 [2021-11-12 22:50:33,374 INFO L226 Difference]: Without dead ends: 4196 [2021-11-12 22:50:33,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:50:33,375 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 166 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1178.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.51ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1351.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:33,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 2 Invalid, 486 Unknown, 0 Unchecked, 5.51ms Time], IncrementalHoareTripleChecker [7 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 1351.40ms Time] [2021-11-12 22:50:33,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-11-12 22:50:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 2474. [2021-11-12 22:50:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 4.004852405984634) internal successors, (9904), 2473 states have internal predecessors, (9904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 9904 transitions. [2021-11-12 22:50:33,533 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 9904 transitions. Word has length 32 [2021-11-12 22:50:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:33,534 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 9904 transitions. [2021-11-12 22:50:33,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:33,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 9904 transitions. [2021-11-12 22:50:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:33,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:33,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:33,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:33,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:33,761 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1297865543, now seen corresponding path program 3 times [2021-11-12 22:50:33,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:33,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979723011] [2021-11-12 22:50:33,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:50:33,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:33,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:33,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:33,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:50:33,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:50:33,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:34,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:34,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:34,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:34,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979723011] [2021-11-12 22:50:34,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979723011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:34,775 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:34,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:50:34,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750964349] [2021-11-12 22:50:34,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:34,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:50:34,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:50:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:50:34,777 INFO L87 Difference]: Start difference. First operand 2474 states and 9904 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:50:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:36,843 INFO L93 Difference]: Finished difference Result 5474 states and 21251 transitions. [2021-11-12 22:50:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:50:36,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 32 [2021-11-12 22:50:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:36,877 INFO L225 Difference]: With dead ends: 5474 [2021-11-12 22:50:36,877 INFO L226 Difference]: Without dead ends: 5352 [2021-11-12 22:50:36,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:50:36,878 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 453 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1291.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.39ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1526.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:36,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 0 Invalid, 633 Unknown, 0 Unchecked, 6.39ms Time], IncrementalHoareTripleChecker [24 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1526.02ms Time] [2021-11-12 22:50:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5352 states. [2021-11-12 22:50:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5352 to 2744. [2021-11-12 22:50:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 3.968282901932191) internal successors, (10885), 2743 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 10885 transitions. [2021-11-12 22:50:37,091 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 10885 transitions. Word has length 32 [2021-11-12 22:50:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:37,092 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 10885 transitions. [2021-11-12 22:50:37,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:50:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 10885 transitions. [2021-11-12 22:50:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:37,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:37,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:37,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:37,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:37,321 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash -702258523, now seen corresponding path program 4 times [2021-11-12 22:50:37,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:37,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122530289] [2021-11-12 22:50:37,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:50:37,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:37,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:37,324 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:37,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:50:37,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:50:37,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:37,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:37,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:37,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:38,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:38,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122530289] [2021-11-12 22:50:38,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122530289] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:50:38,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:50:38,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-12 22:50:38,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286051541] [2021-11-12 22:50:38,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:38,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:50:38,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:50:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:50:38,148 INFO L87 Difference]: Start difference. First operand 2744 states and 10885 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:39,328 INFO L93 Difference]: Finished difference Result 3726 states and 13986 transitions. [2021-11-12 22:50:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:50:39,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:50:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:39,349 INFO L225 Difference]: With dead ends: 3726 [2021-11-12 22:50:39,349 INFO L226 Difference]: Without dead ends: 3528 [2021-11-12 22:50:39,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:50:39,350 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 140 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 891.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1012.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:39,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 5 Invalid, 394 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 1012.58ms Time] [2021-11-12 22:50:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-11-12 22:50:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2484. [2021-11-12 22:50:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2483 states have (on average 3.8892468787756744) internal successors, (9657), 2483 states have internal predecessors, (9657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 9657 transitions. [2021-11-12 22:50:39,475 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 9657 transitions. Word has length 32 [2021-11-12 22:50:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:39,475 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 9657 transitions. [2021-11-12 22:50:39,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 9657 transitions. [2021-11-12 22:50:39,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:39,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:39,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:39,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:39,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:39,699 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1788478537, now seen corresponding path program 5 times [2021-11-12 22:50:39,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:39,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177400468] [2021-11-12 22:50:39,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:50:39,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:39,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:39,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:50:39,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:50:39,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:50:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:40,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:41,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:41,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177400468] [2021-11-12 22:50:41,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177400468] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:50:41,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:50:41,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-11-12 22:50:41,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189754317] [2021-11-12 22:50:41,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:41,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:50:41,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:41,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:50:41,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:50:41,883 INFO L87 Difference]: Start difference. First operand 2484 states and 9657 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:43,000 INFO L93 Difference]: Finished difference Result 3014 states and 11301 transitions. [2021-11-12 22:50:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:50:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:50:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:43,010 INFO L225 Difference]: With dead ends: 3014 [2021-11-12 22:50:43,010 INFO L226 Difference]: Without dead ends: 2974 [2021-11-12 22:50:43,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:50:43,011 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 133 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 788.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.09ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 904.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:43,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1 Invalid, 441 Unknown, 0 Unchecked, 3.09ms Time], IncrementalHoareTripleChecker [7 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 904.03ms Time] [2021-11-12 22:50:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2021-11-12 22:50:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 2622. [2021-11-12 22:50:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2622 states, 2621 states have (on average 3.848912628767646) internal successors, (10088), 2621 states have internal predecessors, (10088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2622 states to 2622 states and 10088 transitions. [2021-11-12 22:50:43,160 INFO L78 Accepts]: Start accepts. Automaton has 2622 states and 10088 transitions. Word has length 32 [2021-11-12 22:50:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:43,161 INFO L470 AbstractCegarLoop]: Abstraction has 2622 states and 10088 transitions. [2021-11-12 22:50:43,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2622 states and 10088 transitions. [2021-11-12 22:50:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:43,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:43,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:43,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:43,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:43,395 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 515544829, now seen corresponding path program 6 times [2021-11-12 22:50:43,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:43,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015011788] [2021-11-12 22:50:43,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:50:43,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:43,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:43,398 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:43,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:50:43,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:50:43,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:43,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:43,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:44,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:44,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015011788] [2021-11-12 22:50:44,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015011788] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:44,187 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:44,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:50:44,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067955058] [2021-11-12 22:50:44,187 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:44,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:50:44,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:50:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:50:44,189 INFO L87 Difference]: Start difference. First operand 2622 states and 10088 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:50:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:46,454 INFO L93 Difference]: Finished difference Result 4640 states and 17428 transitions. [2021-11-12 22:50:46,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 22:50:46,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 32 [2021-11-12 22:50:46,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:46,466 INFO L225 Difference]: With dead ends: 4640 [2021-11-12 22:50:46,466 INFO L226 Difference]: Without dead ends: 4546 [2021-11-12 22:50:46,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:50:46,468 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 445 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1464.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.68ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1704.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:46,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 2 Invalid, 741 Unknown, 0 Unchecked, 5.68ms Time], IncrementalHoareTripleChecker [23 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1704.03ms Time] [2021-11-12 22:50:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2021-11-12 22:50:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 2496. [2021-11-12 22:50:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 3.85811623246493) internal successors, (9626), 2495 states have internal predecessors, (9626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 9626 transitions. [2021-11-12 22:50:46,604 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 9626 transitions. Word has length 32 [2021-11-12 22:50:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:46,604 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 9626 transitions. [2021-11-12 22:50:46,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:50:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 9626 transitions. [2021-11-12 22:50:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:46,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:46,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:46,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:46,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:46,830 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:46,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1998409909, now seen corresponding path program 7 times [2021-11-12 22:50:46,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:46,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75998442] [2021-11-12 22:50:46,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:50:46,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:46,832 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:46,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:50:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:46,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:46,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:47,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:47,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:47,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75998442] [2021-11-12 22:50:47,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75998442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:47,418 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:47,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:50:47,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527333992] [2021-11-12 22:50:47,418 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:47,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:50:47,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:47,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:50:47,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:50:47,419 INFO L87 Difference]: Start difference. First operand 2496 states and 9626 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:50:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:48,983 INFO L93 Difference]: Finished difference Result 3336 states and 13202 transitions. [2021-11-12 22:50:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:50:48,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 32 [2021-11-12 22:50:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:48,993 INFO L225 Difference]: With dead ends: 3336 [2021-11-12 22:50:48,994 INFO L226 Difference]: Without dead ends: 3237 [2021-11-12 22:50:48,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:50:48,995 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 233 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1071.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.31ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1259.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:48,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 0 Invalid, 585 Unknown, 0 Unchecked, 3.31ms Time], IncrementalHoareTripleChecker [9 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 1259.91ms Time] [2021-11-12 22:50:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2021-11-12 22:50:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 2255. [2021-11-12 22:50:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 3.9551907719609583) internal successors, (8915), 2254 states have internal predecessors, (8915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 8915 transitions. [2021-11-12 22:50:49,092 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 8915 transitions. Word has length 32 [2021-11-12 22:50:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:49,093 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 8915 transitions. [2021-11-12 22:50:49,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:50:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 8915 transitions. [2021-11-12 22:50:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:49,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:49,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:49,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:49,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:49,315 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:49,315 INFO L85 PathProgramCache]: Analyzing trace with hash 174497865, now seen corresponding path program 1 times [2021-11-12 22:50:49,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:49,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906762065] [2021-11-12 22:50:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:49,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:49,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:49,317 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:49,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:50:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:49,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:50:49,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:49,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:49,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:49,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906762065] [2021-11-12 22:50:49,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906762065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:49,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771203671] [2021-11-12 22:50:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:49,683 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:49,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:49,683 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:49,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:50:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:49,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:50:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:50,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:50,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771203671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:50,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167141294] [2021-11-12 22:50:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:50,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:50,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:50,227 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:50:50,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 22:50:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:50,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:50:50,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:50,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:50,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167141294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:50,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:50:50,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 6, 9, 7] total 19 [2021-11-12 22:50:50,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741591622] [2021-11-12 22:50:50,796 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:50:50,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:50:50,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:50:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:50:50,798 INFO L87 Difference]: Start difference. First operand 2255 states and 8915 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:54,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:54,604 INFO L93 Difference]: Finished difference Result 4001 states and 15589 transitions. [2021-11-12 22:50:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-12 22:50:54,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:50:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:54,615 INFO L225 Difference]: With dead ends: 4001 [2021-11-12 22:50:54,615 INFO L226 Difference]: Without dead ends: 4001 [2021-11-12 22:50:54,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2021-11-12 22:50:54,617 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 277 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2484.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.11ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2831.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:54,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 20 Invalid, 2004 Unknown, 0 Unchecked, 8.11ms Time], IncrementalHoareTripleChecker [56 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 2831.99ms Time] [2021-11-12 22:50:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-11-12 22:50:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2423. [2021-11-12 22:50:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 4.062758051197357) internal successors, (9840), 2422 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 9840 transitions. [2021-11-12 22:50:54,709 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 9840 transitions. Word has length 32 [2021-11-12 22:50:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:54,710 INFO L470 AbstractCegarLoop]: Abstraction has 2423 states and 9840 transitions. [2021-11-12 22:50:54,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 9840 transitions. [2021-11-12 22:50:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:54,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:54,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:54,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:54,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:55,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-12 22:50:55,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:55,320 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:55,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:55,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1407559557, now seen corresponding path program 2 times [2021-11-12 22:50:55,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:55,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513865559] [2021-11-12 22:50:55,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:50:55,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:55,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:55,322 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:55,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:50:55,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:50:55,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:55,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:55,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:56,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:56,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513865559] [2021-11-12 22:50:56,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513865559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:56,067 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:56,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:50:56,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906595534] [2021-11-12 22:50:56,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:56,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:50:56,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:56,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:50:56,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:50:56,069 INFO L87 Difference]: Start difference. First operand 2423 states and 9840 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:58,584 INFO L93 Difference]: Finished difference Result 9365 states and 35681 transitions. [2021-11-12 22:50:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-12 22:50:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:50:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:58,607 INFO L225 Difference]: With dead ends: 9365 [2021-11-12 22:50:58,608 INFO L226 Difference]: Without dead ends: 9009 [2021-11-12 22:50:58,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=335, Invalid=925, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 22:50:58,609 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 606 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1361.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.59ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1597.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:58,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 3 Invalid, 976 Unknown, 0 Unchecked, 6.59ms Time], IncrementalHoareTripleChecker [52 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1597.96ms Time] [2021-11-12 22:50:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9009 states. [2021-11-12 22:50:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9009 to 3211. [2021-11-12 22:50:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 3210 states have (on average 4.296573208722742) internal successors, (13792), 3210 states have internal predecessors, (13792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 13792 transitions. [2021-11-12 22:50:58,802 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 13792 transitions. Word has length 32 [2021-11-12 22:50:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:58,803 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 13792 transitions. [2021-11-12 22:50:58,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 13792 transitions. [2021-11-12 22:50:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:58,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:58,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:58,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:59,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:59,027 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:50:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash 770017875, now seen corresponding path program 3 times [2021-11-12 22:50:59,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:59,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104032308] [2021-11-12 22:50:59,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:50:59,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:59,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:59,029 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:59,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:50:59,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:50:59,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:59,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:59,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:59,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:59,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104032308] [2021-11-12 22:50:59,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104032308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:59,854 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:59,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:50:59,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707208745] [2021-11-12 22:50:59,854 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:59,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:50:59,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:59,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:50:59,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:50:59,855 INFO L87 Difference]: Start difference. First operand 3211 states and 13792 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:51:01,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:01,985 INFO L93 Difference]: Finished difference Result 6431 states and 26487 transitions. [2021-11-12 22:51:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:51:01,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 32 [2021-11-12 22:51:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:02,005 INFO L225 Difference]: With dead ends: 6431 [2021-11-12 22:51:02,005 INFO L226 Difference]: Without dead ends: 6271 [2021-11-12 22:51:02,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:51:02,007 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 416 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1362.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.40ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1580.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:02,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 0 Invalid, 757 Unknown, 0 Unchecked, 5.40ms Time], IncrementalHoareTripleChecker [35 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1580.98ms Time] [2021-11-12 22:51:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2021-11-12 22:51:02,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 3671. [2021-11-12 22:51:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 4.474931880108992) internal successors, (16423), 3670 states have internal predecessors, (16423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:02,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 16423 transitions. [2021-11-12 22:51:02,164 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 16423 transitions. Word has length 32 [2021-11-12 22:51:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:02,164 INFO L470 AbstractCegarLoop]: Abstraction has 3671 states and 16423 transitions. [2021-11-12 22:51:02,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:51:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 16423 transitions. [2021-11-12 22:51:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:51:02,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:02,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:02,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:02,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:02,389 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:02,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1922488577, now seen corresponding path program 4 times [2021-11-12 22:51:02,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:02,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881585135] [2021-11-12 22:51:02,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:51:02,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:02,393 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:02,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:51:02,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:51:02,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:02,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:51:02,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:51:02,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:51:02,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:02,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881585135] [2021-11-12 22:51:02,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881585135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:02,982 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:02,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:51:02,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415699377] [2021-11-12 22:51:02,982 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:02,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:51:02,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:02,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:51:02,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:51:02,983 INFO L87 Difference]: Start difference. First operand 3671 states and 16423 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:05,255 INFO L93 Difference]: Finished difference Result 8489 states and 34411 transitions. [2021-11-12 22:51:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 22:51:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:51:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:05,275 INFO L225 Difference]: With dead ends: 8489 [2021-11-12 22:51:05,275 INFO L226 Difference]: Without dead ends: 8143 [2021-11-12 22:51:05,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:51:05,276 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 421 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1450.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.97ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1690.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:05,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 0 Invalid, 1016 Unknown, 0 Unchecked, 5.97ms Time], IncrementalHoareTripleChecker [43 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1690.03ms Time] [2021-11-12 22:51:05,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8143 states. [2021-11-12 22:51:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8143 to 3419. [2021-11-12 22:51:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 4.388823873610298) internal successors, (15001), 3418 states have internal predecessors, (15001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 15001 transitions. [2021-11-12 22:51:05,513 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 15001 transitions. Word has length 32 [2021-11-12 22:51:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:05,513 INFO L470 AbstractCegarLoop]: Abstraction has 3419 states and 15001 transitions. [2021-11-12 22:51:05,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 15001 transitions. [2021-11-12 22:51:05,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:51:05,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:05,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:05,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:05,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:05,740 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1277153901, now seen corresponding path program 5 times [2021-11-12 22:51:05,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:05,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286208427] [2021-11-12 22:51:05,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:51:05,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:05,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:05,742 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:05,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:51:05,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:51:05,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:05,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:51:05,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:06,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:07,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:07,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286208427] [2021-11-12 22:51:07,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286208427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:07,191 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:07,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-12 22:51:07,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337214652] [2021-11-12 22:51:07,191 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:07,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:51:07,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:51:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:51:07,192 INFO L87 Difference]: Start difference. First operand 3419 states and 15001 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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) [2021-11-12 22:51:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:10,750 INFO L93 Difference]: Finished difference Result 7649 states and 32426 transitions. [2021-11-12 22:51:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-12 22:51:10,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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 32 [2021-11-12 22:51:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:10,782 INFO L225 Difference]: With dead ends: 7649 [2021-11-12 22:51:10,782 INFO L226 Difference]: Without dead ends: 7403 [2021-11-12 22:51:10,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:51:10,784 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 371 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2042.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.03ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2383.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:10,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 0 Invalid, 1290 Unknown, 0 Unchecked, 8.03ms Time], IncrementalHoareTripleChecker [56 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 2383.88ms Time] [2021-11-12 22:51:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7403 states. [2021-11-12 22:51:10,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7403 to 4285. [2021-11-12 22:51:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4285 states, 4284 states have (on average 4.494631185807656) internal successors, (19255), 4284 states have internal predecessors, (19255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4285 states to 4285 states and 19255 transitions. [2021-11-12 22:51:10,974 INFO L78 Accepts]: Start accepts. Automaton has 4285 states and 19255 transitions. Word has length 32 [2021-11-12 22:51:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:10,975 INFO L470 AbstractCegarLoop]: Abstraction has 4285 states and 19255 transitions. [2021-11-12 22:51:10,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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) [2021-11-12 22:51:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4285 states and 19255 transitions. [2021-11-12 22:51:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:51:10,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:10,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:10,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:11,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:11,186 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash -473009277, now seen corresponding path program 6 times [2021-11-12 22:51:11,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:11,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955773464] [2021-11-12 22:51:11,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:51:11,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:11,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:11,188 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:11,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:51:11,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:51:11,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:11,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:51:11,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:11,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:12,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:12,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955773464] [2021-11-12 22:51:12,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955773464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:12,013 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:12,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:51:12,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588218863] [2021-11-12 22:51:12,013 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:12,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:51:12,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:51:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:51:12,014 INFO L87 Difference]: Start difference. First operand 4285 states and 19255 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:51:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:13,974 INFO L93 Difference]: Finished difference Result 7167 states and 31389 transitions. [2021-11-12 22:51:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:51:13,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 32 [2021-11-12 22:51:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:13,995 INFO L225 Difference]: With dead ends: 7167 [2021-11-12 22:51:13,995 INFO L226 Difference]: Without dead ends: 7011 [2021-11-12 22:51:13,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:51:13,996 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 215 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1244.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1454.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:13,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2 Invalid, 907 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [36 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 1454.86ms Time] [2021-11-12 22:51:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7011 states. [2021-11-12 22:51:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7011 to 4803. [2021-11-12 22:51:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 4.455018742190754) internal successors, (21393), 4802 states have internal predecessors, (21393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 21393 transitions. [2021-11-12 22:51:14,133 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 21393 transitions. Word has length 32 [2021-11-12 22:51:14,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:14,133 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 21393 transitions. [2021-11-12 22:51:14,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-11-12 22:51:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 21393 transitions. [2021-11-12 22:51:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:51:14,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:14,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:14,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:14,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:14,346 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1381980887, now seen corresponding path program 7 times [2021-11-12 22:51:14,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:14,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488770144] [2021-11-12 22:51:14,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:51:14,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:14,347 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:14,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:51:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:14,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:51:14,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:14,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:14,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:14,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488770144] [2021-11-12 22:51:14,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488770144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:14,976 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:14,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:51:14,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331028300] [2021-11-12 22:51:14,976 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:14,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:51:14,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:51:14,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:51:14,978 INFO L87 Difference]: Start difference. First operand 4803 states and 21393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:16,494 INFO L93 Difference]: Finished difference Result 7093 states and 29296 transitions. [2021-11-12 22:51:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:51:16,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:51:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:16,511 INFO L225 Difference]: With dead ends: 7093 [2021-11-12 22:51:16,511 INFO L226 Difference]: Without dead ends: 5800 [2021-11-12 22:51:16,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:51:16,512 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 362 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1017.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1190.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:16,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 0 Invalid, 702 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [38 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1190.94ms Time] [2021-11-12 22:51:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5800 states. [2021-11-12 22:51:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5800 to 2320. [2021-11-12 22:51:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 4.193186718413109) internal successors, (9724), 2319 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 9724 transitions. [2021-11-12 22:51:16,620 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 9724 transitions. Word has length 32 [2021-11-12 22:51:16,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:16,621 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 9724 transitions. [2021-11-12 22:51:16,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:16,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 9724 transitions. [2021-11-12 22:51:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:16,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:16,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:16,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:16,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:16,837 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2056838241, now seen corresponding path program 1 times [2021-11-12 22:51:16,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:16,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392127028] [2021-11-12 22:51:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:16,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:16,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:16,839 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:16,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:51:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:51:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:17,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:17,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:17,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392127028] [2021-11-12 22:51:17,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392127028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:17,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2000709021] [2021-11-12 22:51:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:17,652 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:51:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:51:17,653 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:51:17,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 22:51:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:17,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:51:17,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:18,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:18,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2000709021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:18,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695958888] [2021-11-12 22:51:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:18,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:51:18,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:51:18,541 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:51:18,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-12 22:51:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:18,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:51:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:19,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:19,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695958888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:19,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:51:19,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 9, 9] total 22 [2021-11-12 22:51:19,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152824748] [2021-11-12 22:51:19,479 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:51:19,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 22:51:19,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 22:51:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:51:19,481 INFO L87 Difference]: Start difference. First operand 2320 states and 9724 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:22,625 INFO L93 Difference]: Finished difference Result 6054 states and 25038 transitions. [2021-11-12 22:51:22,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:51:22,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-12 22:51:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:22,675 INFO L225 Difference]: With dead ends: 6054 [2021-11-12 22:51:22,675 INFO L226 Difference]: Without dead ends: 6054 [2021-11-12 22:51:22,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:51:22,676 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 401 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2408.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.67ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2746.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:22,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 44 Invalid, 1493 Unknown, 0 Unchecked, 7.67ms Time], IncrementalHoareTripleChecker [56 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 2746.33ms Time] [2021-11-12 22:51:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2021-11-12 22:51:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 2354. [2021-11-12 22:51:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2353 states have (on average 4.1151721206969825) internal successors, (9683), 2353 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 9683 transitions. [2021-11-12 22:51:22,758 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 9683 transitions. Word has length 35 [2021-11-12 22:51:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:22,758 INFO L470 AbstractCegarLoop]: Abstraction has 2354 states and 9683 transitions. [2021-11-12 22:51:22,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 9683 transitions. [2021-11-12 22:51:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:22,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:22,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:22,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:22,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:23,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-12 22:51:23,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:51:23,379 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1029007940, now seen corresponding path program 1 times [2021-11-12 22:51:23,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:23,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56955966] [2021-11-12 22:51:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:23,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:23,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:23,381 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:23,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:51:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:23,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:23,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:23,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:23,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:23,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56955966] [2021-11-12 22:51:23,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56955966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:23,752 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:23,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:51:23,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458019026] [2021-11-12 22:51:23,753 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:23,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:51:23,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:51:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:51:23,754 INFO L87 Difference]: Start difference. First operand 2354 states and 9683 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:24,696 INFO L93 Difference]: Finished difference Result 3996 states and 16179 transitions. [2021-11-12 22:51:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:51:24,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 35 [2021-11-12 22:51:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:24,706 INFO L225 Difference]: With dead ends: 3996 [2021-11-12 22:51:24,706 INFO L226 Difference]: Without dead ends: 3892 [2021-11-12 22:51:24,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:51:24,707 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 154 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 647.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 750.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:24,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 19 Invalid, 352 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [15 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 750.33ms Time] [2021-11-12 22:51:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-11-12 22:51:24,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 2444. [2021-11-12 22:51:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 4.0749079001228) internal successors, (9955), 2443 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 9955 transitions. [2021-11-12 22:51:24,802 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 9955 transitions. Word has length 35 [2021-11-12 22:51:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:24,804 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 9955 transitions. [2021-11-12 22:51:24,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 9955 transitions. [2021-11-12 22:51:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:24,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:24,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:24,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:25,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:25,028 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:25,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1665818360, now seen corresponding path program 2 times [2021-11-12 22:51:25,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:25,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929769023] [2021-11-12 22:51:25,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:51:25,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:25,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:25,030 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:25,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:51:25,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:51:25,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:25,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:25,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:25,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:25,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:25,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929769023] [2021-11-12 22:51:25,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929769023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:25,385 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:25,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 22:51:25,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814755054] [2021-11-12 22:51:25,386 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:25,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:51:25,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:51:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:51:25,387 INFO L87 Difference]: Start difference. First operand 2444 states and 9955 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2021-11-12 22:51:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:25,998 INFO L93 Difference]: Finished difference Result 3442 states and 13981 transitions. [2021-11-12 22:51:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:51:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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 35 [2021-11-12 22:51:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:26,007 INFO L225 Difference]: With dead ends: 3442 [2021-11-12 22:51:26,007 INFO L226 Difference]: Without dead ends: 3244 [2021-11-12 22:51:26,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:51:26,008 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 444.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 520.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:26,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 14 Invalid, 277 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 520.35ms Time] [2021-11-12 22:51:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2021-11-12 22:51:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 2290. [2021-11-12 22:51:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 4.035386631716907) internal successors, (9237), 2289 states have internal predecessors, (9237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 9237 transitions. [2021-11-12 22:51:26,069 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 9237 transitions. Word has length 35 [2021-11-12 22:51:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:26,069 INFO L470 AbstractCegarLoop]: Abstraction has 2290 states and 9237 transitions. [2021-11-12 22:51:26,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2021-11-12 22:51:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 9237 transitions. [2021-11-12 22:51:26,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:26,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:26,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:26,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:26,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:26,275 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1748550640, now seen corresponding path program 3 times [2021-11-12 22:51:26,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:26,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11376997] [2021-11-12 22:51:26,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:51:26,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:26,277 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:26,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:51:26,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:51:26,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:26,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:26,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:26,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11376997] [2021-11-12 22:51:26,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11376997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:26,659 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:26,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:51:26,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879480632] [2021-11-12 22:51:26,659 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:26,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:51:26,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:26,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:51:26,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:51:26,660 INFO L87 Difference]: Start difference. First operand 2290 states and 9237 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:27,247 INFO L93 Difference]: Finished difference Result 3084 states and 12493 transitions. [2021-11-12 22:51:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:51:27,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-12 22:51:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:27,256 INFO L225 Difference]: With dead ends: 3084 [2021-11-12 22:51:27,256 INFO L226 Difference]: Without dead ends: 2992 [2021-11-12 22:51:27,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:51:27,257 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 148 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 382.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 446.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:27,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 8 Invalid, 224 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [12 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 446.41ms Time] [2021-11-12 22:51:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-11-12 22:51:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2132. [2021-11-12 22:51:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 4.085405912717034) internal successors, (8706), 2131 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 8706 transitions. [2021-11-12 22:51:27,313 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 8706 transitions. Word has length 35 [2021-11-12 22:51:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:27,313 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 8706 transitions. [2021-11-12 22:51:27,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:27,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 8706 transitions. [2021-11-12 22:51:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:27,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:27,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:27,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:27,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:27,523 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1264186106, now seen corresponding path program 4 times [2021-11-12 22:51:27,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:27,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387301461] [2021-11-12 22:51:27,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:51:27,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:27,525 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:27,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:51:27,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:51:27,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:27,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:51:27,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:27,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:28,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:28,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387301461] [2021-11-12 22:51:28,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387301461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:28,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [266583842] [2021-11-12 22:51:28,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:51:28,324 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:51:28,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:51:28,325 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:51:28,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-12 22:51:28,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:51:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:51:28,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:28,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:29,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [266583842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:29,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731674775] [2021-11-12 22:51:29,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:51:29,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:51:29,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:51:29,520 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:51:29,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-12 22:51:29,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:51:29,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:29,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:51:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:30,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:51:30,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731674775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:30,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:51:30,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8, 10, 9] total 24 [2021-11-12 22:51:30,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568675436] [2021-11-12 22:51:30,518 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:51:30,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:51:30,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:30,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:51:30,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:51:30,520 INFO L87 Difference]: Start difference. First operand 2132 states and 8706 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:33,604 INFO L93 Difference]: Finished difference Result 7196 states and 29930 transitions. [2021-11-12 22:51:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:51:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 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 35 [2021-11-12 22:51:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:33,631 INFO L225 Difference]: With dead ends: 7196 [2021-11-12 22:51:33,632 INFO L226 Difference]: Without dead ends: 7196 [2021-11-12 22:51:33,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 22:51:33,633 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 415 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2284.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.37ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 2642.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:33,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 113 Invalid, 1467 Unknown, 0 Unchecked, 9.37ms Time], IncrementalHoareTripleChecker [18 Valid, 1307 Invalid, 0 Unknown, 142 Unchecked, 2642.49ms Time] [2021-11-12 22:51:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7196 states. [2021-11-12 22:51:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7196 to 2022. [2021-11-12 22:51:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 4.099455714992578) internal successors, (8285), 2021 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 8285 transitions. [2021-11-12 22:51:33,727 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 8285 transitions. Word has length 35 [2021-11-12 22:51:33,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:33,728 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 8285 transitions. [2021-11-12 22:51:33,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:33,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 8285 transitions. [2021-11-12 22:51:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:33,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:33,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:33,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:33,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:34,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:34,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:51:34,361 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:34,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1274846572, now seen corresponding path program 5 times [2021-11-12 22:51:34,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:34,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982426330] [2021-11-12 22:51:34,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:51:34,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:34,363 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:34,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 22:51:34,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 22:51:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:34,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:34,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:34,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:34,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982426330] [2021-11-12 22:51:34,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982426330] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:34,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:34,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-12 22:51:34,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062274747] [2021-11-12 22:51:34,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:34,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:51:34,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:51:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:51:34,779 INFO L87 Difference]: Start difference. First operand 2022 states and 8285 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2021-11-12 22:51:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:35,185 INFO L93 Difference]: Finished difference Result 3306 states and 13126 transitions. [2021-11-12 22:51:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:51:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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 35 [2021-11-12 22:51:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:35,193 INFO L225 Difference]: With dead ends: 3306 [2021-11-12 22:51:35,194 INFO L226 Difference]: Without dead ends: 3262 [2021-11-12 22:51:35,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:51:35,194 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 315.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.83ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 369.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:35,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 14 Invalid, 210 Unknown, 0 Unchecked, 0.83ms Time], IncrementalHoareTripleChecker [7 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 369.26ms Time] [2021-11-12 22:51:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-11-12 22:51:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 1924. [2021-11-12 22:51:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 4.137805512220488) internal successors, (7957), 1923 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 7957 transitions. [2021-11-12 22:51:35,241 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 7957 transitions. Word has length 35 [2021-11-12 22:51:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:35,241 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 7957 transitions. [2021-11-12 22:51:35,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2021-11-12 22:51:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 7957 transitions. [2021-11-12 22:51:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:35,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:35,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:35,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:35,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:35,445 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1143599488, now seen corresponding path program 6 times [2021-11-12 22:51:35,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:35,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343009603] [2021-11-12 22:51:35,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:51:35,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:35,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:35,447 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:35,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 22:51:35,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:51:35,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:35,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:35,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:35,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:51:35,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:35,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343009603] [2021-11-12 22:51:35,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343009603] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:35,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:35,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-12 22:51:35,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048297388] [2021-11-12 22:51:35,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:35,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:51:35,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:51:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:51:35,871 INFO L87 Difference]: Start difference. First operand 1924 states and 7957 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2021-11-12 22:51:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:36,271 INFO L93 Difference]: Finished difference Result 2342 states and 9521 transitions. [2021-11-12 22:51:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:51:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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 35 [2021-11-12 22:51:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:36,277 INFO L225 Difference]: With dead ends: 2342 [2021-11-12 22:51:36,277 INFO L226 Difference]: Without dead ends: 2342 [2021-11-12 22:51:36,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:51:36,278 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 308.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 356.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:36,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 8 Invalid, 186 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [7 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 356.75ms Time] [2021-11-12 22:51:36,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-11-12 22:51:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1550. [2021-11-12 22:51:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.9941897998708846) internal successors, (6187), 1549 states have internal predecessors, (6187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 6187 transitions. [2021-11-12 22:51:36,315 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 6187 transitions. Word has length 35 [2021-11-12 22:51:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:36,315 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 6187 transitions. [2021-11-12 22:51:36,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2021-11-12 22:51:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 6187 transitions. [2021-11-12 22:51:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:36,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:36,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:36,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:36,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:36,518 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:36,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1837099659, now seen corresponding path program 2 times [2021-11-12 22:51:36,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:36,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739277374] [2021-11-12 22:51:36,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:51:36,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:36,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:36,520 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:36,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 22:51:36,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:51:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:36,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:36,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:36,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739277374] [2021-11-12 22:51:36,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739277374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:36,994 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:36,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:51:36,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722724529] [2021-11-12 22:51:36,994 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:36,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:51:36,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:36,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:51:36,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:51:36,995 INFO L87 Difference]: Start difference. First operand 1550 states and 6187 transitions. Second operand has 7 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) [2021-11-12 22:51:37,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:37,650 INFO L93 Difference]: Finished difference Result 2558 states and 10267 transitions. [2021-11-12 22:51:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:51:37,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 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 35 [2021-11-12 22:51:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:37,656 INFO L225 Difference]: With dead ends: 2558 [2021-11-12 22:51:37,656 INFO L226 Difference]: Without dead ends: 2546 [2021-11-12 22:51:37,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:51:37,657 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 457.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 525.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:37,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 11 Invalid, 302 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [10 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 525.42ms Time] [2021-11-12 22:51:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-11-12 22:51:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1650. [2021-11-12 22:51:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 4.027289266221953) internal successors, (6641), 1649 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6641 transitions. [2021-11-12 22:51:37,694 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6641 transitions. Word has length 35 [2021-11-12 22:51:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:37,695 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 6641 transitions. [2021-11-12 22:51:37,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 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) [2021-11-12 22:51:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6641 transitions. [2021-11-12 22:51:37,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:37,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:37,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:37,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:37,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:37,898 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:37,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1408138401, now seen corresponding path program 3 times [2021-11-12 22:51:37,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:37,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945026539] [2021-11-12 22:51:37,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:51:37,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:37,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:37,900 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:37,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 22:51:38,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:51:38,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:38,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:38,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:38,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:38,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:38,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945026539] [2021-11-12 22:51:38,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945026539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:38,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:38,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:51:38,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675149470] [2021-11-12 22:51:38,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:38,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:51:38,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:38,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:51:38,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:51:38,359 INFO L87 Difference]: Start difference. First operand 1650 states and 6641 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:39,300 INFO L93 Difference]: Finished difference Result 3126 states and 12488 transitions. [2021-11-12 22:51:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:51:39,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 35 [2021-11-12 22:51:39,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:39,307 INFO L225 Difference]: With dead ends: 3126 [2021-11-12 22:51:39,308 INFO L226 Difference]: Without dead ends: 3126 [2021-11-12 22:51:39,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:51:39,308 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 103 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 690.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.10ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 792.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:39,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 19 Invalid, 483 Unknown, 0 Unchecked, 2.10ms Time], IncrementalHoareTripleChecker [12 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 792.10ms Time] [2021-11-12 22:51:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-11-12 22:51:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 1642. [2021-11-12 22:51:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 4.03290676416819) internal successors, (6618), 1641 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 6618 transitions. [2021-11-12 22:51:39,369 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 6618 transitions. Word has length 35 [2021-11-12 22:51:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:39,369 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 6618 transitions. [2021-11-12 22:51:39,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 6618 transitions. [2021-11-12 22:51:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:39,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:39,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:39,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:39,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:39,573 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1744021793, now seen corresponding path program 4 times [2021-11-12 22:51:39,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:39,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981706426] [2021-11-12 22:51:39,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:51:39,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:39,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:39,576 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:39,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 22:51:39,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:51:39,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:39,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:39,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:39,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:39,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981706426] [2021-11-12 22:51:39,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981706426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:39,864 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:39,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 22:51:39,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536200358] [2021-11-12 22:51:39,865 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:39,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:51:39,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:39,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:51:39,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:51:39,866 INFO L87 Difference]: Start difference. First operand 1642 states and 6618 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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) [2021-11-12 22:51:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:40,630 INFO L93 Difference]: Finished difference Result 2502 states and 9988 transitions. [2021-11-12 22:51:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:51:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 35 [2021-11-12 22:51:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:40,636 INFO L225 Difference]: With dead ends: 2502 [2021-11-12 22:51:40,636 INFO L226 Difference]: Without dead ends: 2478 [2021-11-12 22:51:40,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:51:40,637 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 119 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 573.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 666.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:40,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 12 Invalid, 279 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 666.59ms Time] [2021-11-12 22:51:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-11-12 22:51:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1630. [2021-11-12 22:51:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 4.036832412523021) internal successors, (6576), 1629 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 6576 transitions. [2021-11-12 22:51:40,677 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 6576 transitions. Word has length 35 [2021-11-12 22:51:40,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:40,677 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 6576 transitions. [2021-11-12 22:51:40,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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) [2021-11-12 22:51:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 6576 transitions. [2021-11-12 22:51:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:40,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:40,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:40,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:40,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:40,881 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:40,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1451182455, now seen corresponding path program 5 times [2021-11-12 22:51:40,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:40,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386954325] [2021-11-12 22:51:40,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:51:40,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:40,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:40,882 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:40,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 22:51:41,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:51:41,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:41,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:41,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:41,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:41,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:41,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386954325] [2021-11-12 22:51:41,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386954325] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:41,256 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:41,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:51:41,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109423407] [2021-11-12 22:51:41,256 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:41,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:51:41,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:41,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:51:41,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:51:41,257 INFO L87 Difference]: Start difference. First operand 1630 states and 6576 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:42,114 INFO L93 Difference]: Finished difference Result 2758 states and 10843 transitions. [2021-11-12 22:51:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:51:42,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 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 35 [2021-11-12 22:51:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:42,120 INFO L225 Difference]: With dead ends: 2758 [2021-11-12 22:51:42,124 INFO L226 Difference]: Without dead ends: 2746 [2021-11-12 22:51:42,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:51:42,125 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 173 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 605.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 701.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:42,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 14 Invalid, 395 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [14 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 701.49ms Time] [2021-11-12 22:51:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-11-12 22:51:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1618. [2021-11-12 22:51:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.040816326530612) internal successors, (6534), 1617 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 6534 transitions. [2021-11-12 22:51:42,175 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 6534 transitions. Word has length 35 [2021-11-12 22:51:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:42,175 INFO L470 AbstractCegarLoop]: Abstraction has 1618 states and 6534 transitions. [2021-11-12 22:51:42,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 6534 transitions. [2021-11-12 22:51:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:51:42,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:42,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:42,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:42,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:42,386 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:42,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1880143713, now seen corresponding path program 6 times [2021-11-12 22:51:42,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:42,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746331697] [2021-11-12 22:51:42,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:51:42,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:42,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:42,389 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:42,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 22:51:42,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:51:42,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:42,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:42,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:42,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:42,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746331697] [2021-11-12 22:51:42,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746331697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:42,757 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:42,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:51:42,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771170279] [2021-11-12 22:51:42,757 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:42,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:51:42,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:51:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:51:42,758 INFO L87 Difference]: Start difference. First operand 1618 states and 6534 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) [2021-11-12 22:51:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:43,393 INFO L93 Difference]: Finished difference Result 3448 states and 13447 transitions. [2021-11-12 22:51:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:51:43,393 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 35 [2021-11-12 22:51:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:43,400 INFO L225 Difference]: With dead ends: 3448 [2021-11-12 22:51:43,400 INFO L226 Difference]: Without dead ends: 3448 [2021-11-12 22:51:43,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:51:43,401 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 217 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 477.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 555.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:43,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 22 Invalid, 330 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [16 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 555.15ms Time] [2021-11-12 22:51:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2021-11-12 22:51:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 1598. [2021-11-12 22:51:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 4.054477144646212) internal successors, (6475), 1597 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 6475 transitions. [2021-11-12 22:51:43,443 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 6475 transitions. Word has length 35 [2021-11-12 22:51:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:43,443 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 6475 transitions. [2021-11-12 22:51:43,443 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) [2021-11-12 22:51:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 6475 transitions. [2021-11-12 22:51:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-12 22:51:43,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:43,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:43,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:43,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:43,648 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-12 22:51:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:43,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1807291552, now seen corresponding path program 1 times [2021-11-12 22:51:43,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:43,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456431136] [2021-11-12 22:51:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:43,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:43,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:43,659 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:43,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 22:51:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 22:51:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:44,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 93 [2021-11-12 22:51:45,489 INFO L354 Elim1Store]: treesize reduction 1262, result has 5.7 percent of original size [2021-11-12 22:51:45,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 81 treesize of output 101 [2021-11-12 22:54:49,705 WARN L227 SmtUtils]: Spent 2.99m on a formula simplification. DAG size of input: 375 DAG size of output: 127 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:54:49,707 INFO L354 Elim1Store]: treesize reduction 2057, result has 17.4 percent of original size [2021-11-12 22:54:49,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 123 treesize of output 478 [2021-11-12 23:01:15,016 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-12 23:01:15,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:15,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456431136] [2021-11-12 23:01:15,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-12 23:01:15,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1777969743] [2021-11-12 23:01:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:15,019 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:01:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:01:15,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-12 23:01:15,021 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:01:15,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-12 23:01:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-12 23:01:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:15,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-12 23:01:15,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469038699] [2021-11-12 23:01:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:15,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:01:15,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:01:15,932 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:01:15,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-12 23:01:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:16,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-12 23:01:16,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:16,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-12 23:01:16,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:16,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-12 23:01:16,216 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-12 23:01:16,217 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-12 23:01:16,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2021-11-12 23:01:16,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2021-11-12 23:01:16,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2021-11-12 23:01:16,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2021-11-12 23:01:16,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2021-11-12 23:01:16,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:16,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:16,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-12 23:01:16,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9190fc6c-55de-4211-aa72-bde026edd319/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:16,829 INFO L732 BasicCegarLoop]: Path program histogram: [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:16,834 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-12 23:01:16,834 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:01:16,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:01:16 BasicIcfg [2021-11-12 23:01:16,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:01:16,866 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:01:16,866 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:01:16,866 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:01:16,867 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:43" (3/4) ... [2021-11-12 23:01:16,869 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:01:16,870 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:01:16,870 INFO L158 Benchmark]: Toolchain (without parser) took 695549.35ms. Allocated memory was 67.1MB in the beginning and 536.9MB in the end (delta: 469.8MB). Free memory was 46.7MB in the beginning and 255.4MB in the end (delta: -208.7MB). Peak memory consumption was 261.4MB. Max. memory is 16.1GB. [2021-11-12 23:01:16,871 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 67.1MB. Free memory is still 48.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:01:16,871 INFO L158 Benchmark]: CACSL2BoogieTranslator took 466.21ms. Allocated memory is still 67.1MB. Free memory was 46.5MB in the beginning and 45.7MB in the end (delta: 812.7kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:01:16,871 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.32ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 43.0MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-12 23:01:16,872 INFO L158 Benchmark]: Boogie Preprocessor took 50.18ms. Allocated memory is still 67.1MB. Free memory was 43.0MB in the beginning and 40.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:01:16,872 INFO L158 Benchmark]: RCFGBuilder took 1307.98ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 40.7MB in the beginning and 50.7MB in the end (delta: -10.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-12 23:01:16,873 INFO L158 Benchmark]: TraceAbstraction took 693651.50ms. Allocated memory was 98.6MB in the beginning and 536.9MB in the end (delta: 438.3MB). Free memory was 50.2MB in the beginning and 255.4MB in the end (delta: -205.1MB). Peak memory consumption was 232.9MB. Max. memory is 16.1GB. [2021-11-12 23:01:16,873 INFO L158 Benchmark]: Witness Printer took 4.10ms. Allocated memory is still 536.9MB. Free memory is still 255.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:01:16,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 67.1MB. Free memory is still 48.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 466.21ms. Allocated memory is still 67.1MB. Free memory was 46.5MB in the beginning and 45.7MB in the end (delta: 812.7kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.32ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 43.0MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.18ms. Allocated memory is still 67.1MB. Free memory was 43.0MB in the beginning and 40.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1307.98ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 40.7MB in the beginning and 50.7MB in the end (delta: -10.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 693651.50ms. Allocated memory was 98.6MB in the beginning and 536.9MB in the end (delta: 438.3MB). Free memory was 50.2MB in the beginning and 255.4MB in the end (delta: -205.1MB). Peak memory consumption was 232.9MB. Max. memory is 16.1GB. * Witness Printer took 4.10ms. Allocated memory is still 536.9MB. Free memory is still 255.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 31.4s, 218 PlacesBefore, 49 PlacesAfterwards, 223 TransitionsBefore, 42 TransitionsAfterwards, 2000 CoEnabledTransitionPairs, 8 FixpointIterations, 139 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 31 TrivialYvCompositions, 8 ConcurrentYvCompositions, 12 ChoiceCompositions, 217 TotalNumberOfCompositions, 4258 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2926, positive: 2812, positive conditional: 0, positive unconditional: 2812, negative: 114, negative conditional: 0, negative unconditional: 114, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1299, positive: 1273, positive conditional: 0, positive unconditional: 1273, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1299, positive: 1272, positive conditional: 0, positive unconditional: 1272, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 27, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 982, positive: 79, positive conditional: 0, positive unconditional: 79, negative: 903, negative conditional: 0, negative unconditional: 903, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2926, positive: 1539, positive conditional: 0, positive unconditional: 1539, negative: 88, negative conditional: 0, negative unconditional: 88, unknown: 1299, unknown conditional: 0, unknown unconditional: 1299] , Statistics on independence cache: Total cache size (in pairs): 198, Positive cache size: 185, Positive conditional cache size: 0, Positive unconditional cache size: 185, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 152]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L41] 0 int *q1, *q2; [L42] 0 int q1_front, q1_back, q2_front, q2_back, i, j, n1, n2, N, C, total; [L126] 0 pthread_t t1, t2, t3, t4; [L128] 0 C = __VERIFIER_nondet_int() [L129] 0 N = __VERIFIER_nondet_int() [L130] 0 n1 = __VERIFIER_nondet_int() [L131] 0 n2 = __VERIFIER_nondet_int() [L132] 0 q1_front = __VERIFIER_nondet_int() [L133] 0 q1_back = q1_front [L134] 0 q2_front = __VERIFIER_nondet_int() [L135] 0 q2_back = q2_front [L136] CALL, EXPR 0 create_fresh_int_array(n1) [L158] CALL 0 assume_abort_if_not(size >= 0) [L38] COND TRUE 0 !cond [L158] RET 0 assume_abort_if_not(size >= 0) [L159] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L159] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L161] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L162] 0 int i = 0; [L162] COND TRUE 0 i < size [L163] 0 arr[i] = __VERIFIER_nondet_int() [L162] 0 i++ [L162] COND FALSE 0 !(i < size) [L165] 0 return arr; [L136] RET, EXPR 0 create_fresh_int_array(n1) [L136] 0 q1 = create_fresh_int_array(n1) [L137] CALL, EXPR 0 create_fresh_int_array(n2) [L158] CALL 0 assume_abort_if_not(size >= 0) [L38] COND TRUE 0 !cond [L158] RET 0 assume_abort_if_not(size >= 0) [L159] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L159] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L161] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L162] 0 int i = 0; [L162] COND TRUE 0 i < size [L163] 0 arr[i] = __VERIFIER_nondet_int() [L162] 0 i++ [L162] COND FALSE 0 !(i < size) [L165] 0 return arr; [L137] RET, EXPR 0 create_fresh_int_array(n2) [L137] 0 q2 = create_fresh_int_array(n2) [L139] CALL 0 assume_abort_if_not(C > -2147483648 && N >= 0) [L38] COND TRUE 0 !cond [L139] RET 0 assume_abort_if_not(C > -2147483648 && N >= 0) [L142] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L49] 1 _Bool cond = i < N; [L51] COND TRUE 1 \read(cond) [L53] CALL 1 assume_abort_if_not(q1_back >= 0 && q1_back < n1) [L38] COND TRUE 1 !cond [L53] RET 1 assume_abort_if_not(q1_back >= 0 && q1_back < n1) [L54] EXPR 1 q1[q1_back] [L54] CALL 1 assume_abort_if_not(q1[q1_back] == C) [L38] COND FALSE 1 !(!cond) [L54] RET 1 assume_abort_if_not(q1[q1_back] == C) [L55] 1 q1_back++ [L58] 1 i++ [L61] 1 cond = i < N [L51] COND FALSE 1 !(\read(cond)) [L65] 1 return 0; [L143] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L144] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L91] 3 _Bool cond = i < N || q1_front < q1_back; [L93] COND TRUE 3 \read(cond) [L95] CALL 3 assume_abort_if_not(q1_front < q1_back && q1_front >= 0 && q1_front < n1) [L38] COND FALSE 3 !(!cond) [L95] RET 3 assume_abort_if_not(q1_front < q1_back && q1_front >= 0 && q1_front < n1) [L96] EXPR 3 q1[q1_front] [L96] CALL, EXPR 3 plus(total, q1[q1_front]) [L169] CALL 3 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L38] COND TRUE 3 !cond [L169] RET 3 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L170] CALL 3 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND TRUE 3 !cond [L170] RET 3 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L171] 3 return a + b; [L96] RET, EXPR 3 plus(total, q1[q1_front]) [L96] 3 total = plus(total, q1[q1_front]) [L97] 3 q1_front++ [L145] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) [L109] 4 _Bool cond = j < N || q2_front < q2_back; [L146] 0 \read(t1) [L146] FCALL, JOIN 1 pthread_join(t1, 0) [L147] 0 \read(t2) [L70] 2 _Bool cond = j < N; [L72] COND TRUE 2 \read(cond) [L74] CALL 2 assume_abort_if_not(q2_back >= 0 && q2_back < n2) [L38] COND FALSE 2 !(!cond) [L74] RET 2 assume_abort_if_not(q2_back >= 0 && q2_back < n2) [L75] EXPR 2 q2[q2_back] [L75] CALL 2 assume_abort_if_not(q2[q2_back] == -C) [L38] COND FALSE 2 !(!cond) [L75] RET 2 assume_abort_if_not(q2[q2_back] == -C) [L76] 2 q2_back++ [L111] COND TRUE 4 \read(cond) [L113] CALL 4 assume_abort_if_not(q2_front < q2_back && q2_front >= 0 && q2_front < n2) [L38] COND TRUE 4 !cond [L113] RET 4 assume_abort_if_not(q2_front < q2_back && q2_front >= 0 && q2_front < n2) [L114] EXPR 4 q2[q2_front] [L114] CALL, EXPR 4 plus(total, q2[q2_front]) [L169] CALL 4 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L38] COND FALSE 4 !(!cond) [L169] RET 4 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L170] CALL 4 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 4 !(!cond) [L170] RET 4 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L171] 4 return a + b; [L114] RET, EXPR 4 plus(total, q2[q2_front]) [L114] 4 total = plus(total, q2[q2_front]) [L115] 4 q2_front++ [L79] 2 j++ [L82] 2 cond = j < N [L118] 4 cond = j < N || q2_front < q2_back [L72] COND FALSE 2 !(\read(cond)) [L86] 2 return 0; [L147] FCALL, JOIN 2 pthread_join(t2, 0) [L148] 0 \read(t3) [L100] 3 cond = i < N || q1_front < q1_back [L104] 3 return 0; [L148] FCALL, JOIN 3 pthread_join(t3, 0) [L149] 0 \read(t4) [L111] COND FALSE 4 !(\read(cond)) [L122] 4 return 0; [L149] FCALL, JOIN 4 pthread_join(t4, 0) [L151] CALL 0 assume_abort_if_not(total != 0) [L38] COND TRUE 0 !cond [L151] RET 0 assume_abort_if_not(total != 0) [L152] 0 reach_error() - UnprovableResult [Line: 144]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 143]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 145]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 142]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 240 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 693.5s, OverallIterations: 32, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.3s, AutomataDifference: 47.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 31.5s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6897 SdHoareTripleChecker+Valid, 36726.34ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6897 mSDsluCounter, 404 SdHoareTripleChecker+Invalid, 31690.89ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 142 IncrementalHoareTripleChecker+Unchecked, 10049 mSDsCounter, 601 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18068 IncrementalHoareTripleChecker+Invalid, 18811 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 601 mSolverCounterUnsat, 124 mSDtfsCounter, 18068 mSolverCounterSat, 123.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2847 GetRequests, 2338 SyntacticMatches, 2 SemanticMatches, 507 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2524 ImplicationChecksByTransitivity, 13.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4803occurred in iteration=18, InterpolantAutomatonStates: 422, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 31 MinimizatonAttempts, 57738 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 592.7s InterpolantComputationTime, 1351 NumberOfCodeBlocks, 1342 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 2548 ConstructedInterpolants, 4 QuantifiedInterpolants, 13430 SizeOfPredicates, 352 NumberOfNonLiveVariables, 6506 ConjunctsInSsa, 362 ConjunctsInUnsatCore, 80 InterpolantComputations, 49 PerfectInterpolantSequences, 227/284 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN