./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:11:40,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:11:40,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:11:40,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:11:40,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:11:40,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:11:40,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:11:40,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:11:40,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:11:40,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:11:40,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:11:40,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:11:40,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:11:40,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:11:40,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:11:40,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:11:40,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:11:40,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:11:40,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:11:40,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:11:40,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:11:40,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:11:40,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:11:40,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:11:40,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:11:40,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:11:40,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:11:40,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:11:40,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:11:40,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:11:40,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:11:40,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:11:40,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:11:40,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:11:40,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:11:40,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:11:40,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:11:40,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:11:40,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:11:40,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:11:40,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:11:40,275 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:11:40,323 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:11:40,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:11:40,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:11:40,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:11:40,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:11:40,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:11:40,326 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:11:40,327 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:11:40,327 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:11:40,327 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:11:40,327 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:11:40,328 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:11:40,328 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:11:40,328 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:11:40,329 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:11:40,329 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:11:40,329 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:11:40,329 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:11:40,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:11:40,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:11:40,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:11:40,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:11:40,332 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:11:40,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:11:40,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:11:40,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:11:40,335 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:11:40,335 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:11:40,335 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:11:40,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:11:40,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:11:40,336 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:11:40,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:11:40,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:11:40,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:11:40,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:11:40,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:11:40,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:11:40,338 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:11:40,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:11:40,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:11:40,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:11:40,339 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_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2021-11-25 19:11:40,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:11:40,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:11:40,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:11:40,640 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:11:40,641 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:11:40,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2021-11-25 19:11:40,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data/c6e2b8f08/5b063589f88d4b6d9c753858499304ce/FLAG2fe3ec22d [2021-11-25 19:11:41,257 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:11:41,257 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2021-11-25 19:11:41,271 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data/c6e2b8f08/5b063589f88d4b6d9c753858499304ce/FLAG2fe3ec22d [2021-11-25 19:11:41,550 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data/c6e2b8f08/5b063589f88d4b6d9c753858499304ce [2021-11-25 19:11:41,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:11:41,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:11:41,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:11:41,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:11:41,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:11:41,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:11:41" (1/1) ... [2021-11-25 19:11:41,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15efd969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:41, skipping insertion in model container [2021-11-25 19:11:41,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:11:41" (1/1) ... [2021-11-25 19:11:41,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:11:41,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:11:41,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:11:41,958 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) [2021-11-25 19:11:41,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26c7a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:41, skipping insertion in model container [2021-11-25 19:11:41,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:11:41,959 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 19:11:41,961 INFO L158 Benchmark]: Toolchain (without parser) took 405.46ms. Allocated memory is still 109.1MB. Free memory was 75.5MB in the beginning and 81.1MB in the end (delta: -5.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:11:41,962 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 109.1MB. Free memory was 61.2MB in the beginning and 61.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:11:41,963 INFO L158 Benchmark]: CACSL2BoogieTranslator took 402.44ms. Allocated memory is still 109.1MB. Free memory was 75.2MB in the beginning and 81.1MB in the end (delta: -5.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:11:41,965 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 109.1MB. Free memory was 61.2MB in the beginning and 61.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 402.44ms. Allocated memory is still 109.1MB. Free memory was 75.2MB in the beginning and 81.1MB in the end (delta: -5.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 545]: 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_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:11:44,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:11:44,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:11:44,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:11:44,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:11:44,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:11:44,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:11:44,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:11:44,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:11:44,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:11:44,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:11:44,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:11:44,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:11:44,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:11:44,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:11:44,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:11:44,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:11:44,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:11:44,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:11:44,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:11:44,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:11:44,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:11:44,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:11:44,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:11:44,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:11:44,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:11:44,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:11:44,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:11:44,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:11:44,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:11:44,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:11:44,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:11:44,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:11:44,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:11:44,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:11:44,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:11:44,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:11:44,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:11:44,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:11:44,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:11:44,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:11:44,369 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 19:11:44,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:11:44,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:11:44,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:11:44,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:11:44,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:11:44,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:11:44,418 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:11:44,418 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:11:44,418 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:11:44,418 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:11:44,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:11:44,420 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:11:44,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:11:44,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:11:44,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:11:44,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:11:44,422 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:11:44,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:11:44,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:11:44,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:11:44,422 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:11:44,423 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:11:44,423 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:11:44,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:11:44,423 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:11:44,423 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:11:44,423 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:11:44,424 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:11:44,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:11:44,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:11:44,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:11:44,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:11:44,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:11:44,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:11:44,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:11:44,426 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:11:44,426 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:11:44,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:11:44,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:11:44,426 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_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2021-11-25 19:11:44,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:11:44,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:11:44,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:11:44,827 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:11:44,828 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:11:44,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2021-11-25 19:11:44,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data/69b6a8e2b/317d15f5cc8646de8708da1f83ebab42/FLAG196c9c51a [2021-11-25 19:11:45,425 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:11:45,432 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2021-11-25 19:11:45,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data/69b6a8e2b/317d15f5cc8646de8708da1f83ebab42/FLAG196c9c51a [2021-11-25 19:11:45,746 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/data/69b6a8e2b/317d15f5cc8646de8708da1f83ebab42 [2021-11-25 19:11:45,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:11:45,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:11:45,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:11:45,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:11:45,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:11:45,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:11:45" (1/1) ... [2021-11-25 19:11:45,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10bde228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:45, skipping insertion in model container [2021-11-25 19:11:45,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:11:45" (1/1) ... [2021-11-25 19:11:45,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:11:45,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:11:46,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:11:46,196 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 19:11:46,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:11:46,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:11:46,235 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:11:46,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:11:46,340 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:11:46,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46 WrapperNode [2021-11-25 19:11:46,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:11:46,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:11:46,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:11:46,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:11:46,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,394 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-11-25 19:11:46,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:11:46,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:11:46,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:11:46,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:11:46,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:11:46,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:11:46,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:11:46,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:11:46,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (1/1) ... [2021-11-25 19:11:46,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:11:46,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:46,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:11:46,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:11:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 19:11:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:11:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:11:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 19:11:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:11:46,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:11:46,655 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:11:46,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:11:47,051 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:11:47,057 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:11:47,057 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 19:11:47,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:11:47 BoogieIcfgContainer [2021-11-25 19:11:47,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:11:47,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:11:47,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:11:47,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:11:47,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:11:45" (1/3) ... [2021-11-25 19:11:47,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7a905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:11:47, skipping insertion in model container [2021-11-25 19:11:47,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:46" (2/3) ... [2021-11-25 19:11:47,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7a905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:11:47, skipping insertion in model container [2021-11-25 19:11:47,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:11:47" (3/3) ... [2021-11-25 19:11:47,067 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-alloca-2.i [2021-11-25 19:11:47,072 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:11:47,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-25 19:11:47,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:11:47,123 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-25 19:11:47,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-25 19:11:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:47,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:11:47,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:47,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:47,144 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:47,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-25 19:11:47,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:47,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507101669] [2021-11-25 19:11:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:47,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:47,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:47,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:47,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:11:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:47,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:11:47,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:47,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:47,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:47,494 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-25 19:11:47,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 44 [2021-11-25 19:11:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:47,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:47,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:47,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507101669] [2021-11-25 19:11:47,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507101669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:47,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:47,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:11:47,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809974993] [2021-11-25 19:11:47,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:47,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:11:47,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:47,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:11:47,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:11:47,798 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 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 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:47,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:47,824 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-11-25 19:11:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:11:47,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 19:11:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:47,834 INFO L225 Difference]: With dead ends: 49 [2021-11-25 19:11:47,835 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 19:11:47,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:11:47,840 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:47,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-11-25 19:11:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 19:11:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-11-25 19:11:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 41 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) [2021-11-25 19:11:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-25 19:11:47,881 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 7 [2021-11-25 19:11:47,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:47,882 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-25 19:11:47,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-25 19:11:47,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:11:47,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:47,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:47,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-25 19:11:48,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:48,094 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-11-25 19:11:48,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:48,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676016607] [2021-11-25 19:11:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:48,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:48,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:48,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:48,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:11:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:11:48,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:48,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:48,294 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-11-25 19:11:48,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 20 [2021-11-25 19:11:48,304 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 20 treesize of output 18 [2021-11-25 19:11:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:48,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:48,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:48,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676016607] [2021-11-25 19:11:48,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676016607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:48,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:48,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:11:48,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550759723] [2021-11-25 19:11:48,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:48,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:11:48,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:11:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:11:48,381 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:48,724 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-11-25 19:11:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:11:48,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 19:11:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:48,727 INFO L225 Difference]: With dead ends: 83 [2021-11-25 19:11:48,727 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 19:11:48,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:11:48,730 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:48,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 167 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:11:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 19:11:48,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 46. [2021-11-25 19:11:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.696969696969697) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-25 19:11:48,738 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 7 [2021-11-25 19:11:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:48,739 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-25 19:11:48,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-25 19:11:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:11:48,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:48,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:48,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:48,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:48,951 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:48,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-25 19:11:48,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:48,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906926129] [2021-11-25 19:11:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:48,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:48,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:48,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:48,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:11:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:49,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:11:49,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:49,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:49,110 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-11-25 19:11:49,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 24 [2021-11-25 19:11:49,126 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 22 treesize of output 20 [2021-11-25 19:11:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:49,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:49,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:49,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906926129] [2021-11-25 19:11:49,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906926129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:49,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:49,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:11:49,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145191473] [2021-11-25 19:11:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:49,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:11:49,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:11:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:11:49,271 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:49,312 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-25 19:11:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:11:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 19:11:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:49,314 INFO L225 Difference]: With dead ends: 46 [2021-11-25 19:11:49,315 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 19:11:49,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:11:49,316 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:49,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 108 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2021-11-25 19:11:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 19:11:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-25 19:11:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.6875) internal successors, (54), 44 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) [2021-11-25 19:11:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-11-25 19:11:49,324 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2021-11-25 19:11:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:49,324 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-11-25 19:11:49,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:49,325 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-11-25 19:11:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:11:49,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:49,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:49,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:49,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:49,538 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:49,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130454, now seen corresponding path program 1 times [2021-11-25 19:11:49,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:49,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238198717] [2021-11-25 19:11:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:49,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:49,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:49,542 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:49,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:11:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:49,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:11:49,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:49,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:49,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:49,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238198717] [2021-11-25 19:11:49,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238198717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:49,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:49,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:11:49,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131309303] [2021-11-25 19:11:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:49,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:11:49,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:11:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:11:49,674 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:49,739 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-11-25 19:11:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:11:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-25 19:11:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:49,741 INFO L225 Difference]: With dead ends: 47 [2021-11-25 19:11:49,742 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 19:11:49,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:11:49,743 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:49,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 78 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:11:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 19:11:49,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-11-25 19:11:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 41 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) [2021-11-25 19:11:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-25 19:11:49,749 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 9 [2021-11-25 19:11:49,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:49,749 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-25 19:11:49,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:49,749 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-25 19:11:49,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:11:49,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:49,750 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:49,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:49,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:49,961 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083541, now seen corresponding path program 1 times [2021-11-25 19:11:49,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:49,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140805210] [2021-11-25 19:11:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:49,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:49,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:49,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:49,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 19:11:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:50,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:11:50,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:50,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:50,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:50,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140805210] [2021-11-25 19:11:50,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140805210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:50,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014493274] [2021-11-25 19:11:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:50,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:11:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:11:50,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:11:50,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-25 19:11:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:50,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:11:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:50,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:50,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2014493274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:50,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:11:50,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 9 [2021-11-25 19:11:50,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569655058] [2021-11-25 19:11:50,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:50,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:11:50,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:11:50,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:11:50,304 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:50,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:50,405 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-25 19:11:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:11:50,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-25 19:11:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:50,406 INFO L225 Difference]: With dead ends: 41 [2021-11-25 19:11:50,406 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 19:11:50,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:11:50,408 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:50,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:11:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 19:11:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-25 19:11:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 40 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) [2021-11-25 19:11:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-11-25 19:11:50,413 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 11 [2021-11-25 19:11:50,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:50,413 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-11-25 19:11:50,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-11-25 19:11:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:11:50,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:50,414 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:50,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:50,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:50,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:50,815 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2021-11-25 19:11:50,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:50,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806548481] [2021-11-25 19:11:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:50,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:50,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:50,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:50,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:11:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:50,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:11:50,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:50,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:51,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806548481] [2021-11-25 19:11:51,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806548481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:51,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776119628] [2021-11-25 19:11:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:51,027 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:11:51,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:11:51,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:11:51,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 19:11:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:11:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:51,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:51,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776119628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:51,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537402390] [2021-11-25 19:11:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:51,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:51,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:51,243 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:51,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:11:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:11:51,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:51,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:51,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537402390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:51,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:11:51,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 19:11:51,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844263905] [2021-11-25 19:11:51,416 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:11:51,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:11:51,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:11:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:11:51,418 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:51,503 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2021-11-25 19:11:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:11:51,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 11 [2021-11-25 19:11:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:51,505 INFO L225 Difference]: With dead ends: 77 [2021-11-25 19:11:51,505 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 19:11:51,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:11:51,507 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 179 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:51,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 153 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:11:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 19:11:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 48. [2021-11-25 19:11:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-11-25 19:11:51,513 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2021-11-25 19:11:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:51,513 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-11-25 19:11:51,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-11-25 19:11:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:11:51,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:51,515 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:51,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:51,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-25 19:11:51,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:52,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:11:52,134 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:52,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-25 19:11:52,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:52,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774911209] [2021-11-25 19:11:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:52,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:52,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:52,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:52,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:11:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:52,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:11:52,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:52,311 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-11-25 19:11:52,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 24 [2021-11-25 19:11:52,324 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 22 treesize of output 20 [2021-11-25 19:11:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:52,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:53,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:53,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:53,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774911209] [2021-11-25 19:11:53,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774911209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:53,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419067514] [2021-11-25 19:11:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:53,396 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:11:53,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:11:53,398 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:11:53,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 19:11:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:11:53,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:53,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:53,670 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-11-25 19:11:53,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 24 [2021-11-25 19:11:53,681 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 24 treesize of output 22 [2021-11-25 19:11:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:53,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:54,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:54,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [419067514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:54,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289725025] [2021-11-25 19:11:54,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:54,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:54,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:54,190 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:54,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:11:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:11:54,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:54,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:54,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:54,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:54,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-25 19:11:54,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:11:54,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2021-11-25 19:11:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:54,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:54,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:54,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:54,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289725025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:54,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:11:54,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 6, 5, 5] total 14 [2021-11-25 19:11:54,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306347562] [2021-11-25 19:11:54,813 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:11:54,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:11:54,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:11:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:11:54,815 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:55,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:55,542 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2021-11-25 19:11:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:11:55,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 19:11:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:55,545 INFO L225 Difference]: With dead ends: 85 [2021-11-25 19:11:55,545 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 19:11:55,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:11:55,546 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 196 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:55,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 233 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 7 Unchecked, 0.7s Time] [2021-11-25 19:11:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 19:11:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 56. [2021-11-25 19:11:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.5) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-25 19:11:55,552 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 11 [2021-11-25 19:11:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:55,553 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-25 19:11:55,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-25 19:11:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:11:55,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:55,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:55,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:55,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:55,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-25 19:11:56,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:56,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:56,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2021-11-25 19:11:56,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:56,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413799484] [2021-11-25 19:11:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:56,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:56,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:56,177 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:56,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:11:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:56,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:11:56,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:56,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:56,302 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-25 19:11:56,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 132 [2021-11-25 19:11:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:11:56,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:56,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:56,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413799484] [2021-11-25 19:11:56,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413799484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:56,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:56,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:11:56,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625461513] [2021-11-25 19:11:56,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:56,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:11:56,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:56,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:11:56,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:11:56,403 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:56,470 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-11-25 19:11:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:11:56,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-25 19:11:56,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:56,473 INFO L225 Difference]: With dead ends: 55 [2021-11-25 19:11:56,473 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 19:11:56,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:11:56,473 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:56,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:11:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 19:11:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-25 19:11:56,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-11-25 19:11:56,479 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 13 [2021-11-25 19:11:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:56,479 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-11-25 19:11:56,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-11-25 19:11:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:11:56,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:56,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:56,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:56,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:56,686 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2021-11-25 19:11:56,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:56,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055306111] [2021-11-25 19:11:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:56,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:56,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:56,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:56,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 19:11:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:56,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:11:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:56,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:56,826 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-11-25 19:11:56,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2021-11-25 19:11:56,840 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 106 treesize of output 102 [2021-11-25 19:11:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:11:56,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:56,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055306111] [2021-11-25 19:11:56,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055306111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:56,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:56,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:11:56,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162503833] [2021-11-25 19:11:56,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:56,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:11:56,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:56,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:11:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:11:56,963 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:57,218 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-11-25 19:11:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:11:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-25 19:11:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:57,220 INFO L225 Difference]: With dead ends: 109 [2021-11-25 19:11:57,220 INFO L226 Difference]: Without dead ends: 109 [2021-11-25 19:11:57,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:11:57,220 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 78 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:57,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 166 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:11:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-25 19:11:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2021-11-25 19:11:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 78 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2021-11-25 19:11:57,227 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 13 [2021-11-25 19:11:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:57,228 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2021-11-25 19:11:57,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2021-11-25 19:11:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:11:57,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:57,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:57,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:57,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:57,446 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:57,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1811674902, now seen corresponding path program 1 times [2021-11-25 19:11:57,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:57,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510250184] [2021-11-25 19:11:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:57,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:57,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:57,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:57,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 19:11:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:11:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:11:57,597 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 19:11:57,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-11-25 19:11:57,608 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 114 treesize of output 110 [2021-11-25 19:11:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:11:57,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:57,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:57,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510250184] [2021-11-25 19:11:57,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510250184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:57,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:57,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:11:57,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188565958] [2021-11-25 19:11:57,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:57,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:11:57,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:57,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:11:57,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:11:57,821 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:57,864 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-11-25 19:11:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:11:57,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-25 19:11:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:57,866 INFO L225 Difference]: With dead ends: 81 [2021-11-25 19:11:57,866 INFO L226 Difference]: Without dead ends: 81 [2021-11-25 19:11:57,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:11:57,867 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:57,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2021-11-25 19:11:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-25 19:11:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-25 19:11:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-11-25 19:11:57,873 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 13 [2021-11-25 19:11:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:57,874 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-11-25 19:11:57,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-11-25 19:11:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:11:57,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:57,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:57,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:58,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:58,076 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1046384445, now seen corresponding path program 1 times [2021-11-25 19:11:58,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:58,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146055840] [2021-11-25 19:11:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:58,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:58,078 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:58,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:11:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:11:58,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:11:58,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:58,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:58,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146055840] [2021-11-25 19:11:58,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146055840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:58,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:58,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:11:58,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378517313] [2021-11-25 19:11:58,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:58,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:11:58,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:58,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:11:58,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:11:58,199 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:58,336 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2021-11-25 19:11:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:11:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-25 19:11:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:58,338 INFO L225 Difference]: With dead ends: 130 [2021-11-25 19:11:58,338 INFO L226 Difference]: Without dead ends: 130 [2021-11-25 19:11:58,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:11:58,339 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 71 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:58,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 127 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:11:58,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-25 19:11:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 91. [2021-11-25 19:11:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 80 states have (on average 1.3625) internal successors, (109), 90 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-11-25 19:11:58,345 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 16 [2021-11-25 19:11:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:58,345 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-11-25 19:11:58,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-11-25 19:11:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:11:58,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:58,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:58,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:58,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:58,558 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:58,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1046385311, now seen corresponding path program 1 times [2021-11-25 19:11:58,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:58,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502585186] [2021-11-25 19:11:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:58,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:58,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:58,560 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:58,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 19:11:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:11:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:58,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:58,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:58,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502585186] [2021-11-25 19:11:58,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502585186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:58,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:58,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:11:58,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855354430] [2021-11-25 19:11:58,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:58,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:11:58,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:11:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:11:58,681 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:58,796 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2021-11-25 19:11:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:11:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-25 19:11:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:58,798 INFO L225 Difference]: With dead ends: 89 [2021-11-25 19:11:58,798 INFO L226 Difference]: Without dead ends: 89 [2021-11-25 19:11:58,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:11:58,799 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:58,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:11:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-25 19:11:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-25 19:11:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.3375) internal successors, (107), 88 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2021-11-25 19:11:58,803 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 16 [2021-11-25 19:11:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:58,804 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2021-11-25 19:11:58,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2021-11-25 19:11:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:11:58,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:58,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:58,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:59,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:59,014 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:11:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1046385312, now seen corresponding path program 1 times [2021-11-25 19:11:59,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:59,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197717267] [2021-11-25 19:11:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:59,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:59,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:59,017 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:59,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 19:11:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:11:59,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:59,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:59,516 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 25 treesize of output 21 [2021-11-25 19:11:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:59,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:59,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197717267] [2021-11-25 19:11:59,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197717267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:59,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1904047741] [2021-11-25 19:11:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:59,613 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:11:59,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:11:59,614 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:11:59,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-25 19:11:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:11:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:11:59,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:59,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1904047741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:59,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:11:59,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2021-11-25 19:11:59,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440630706] [2021-11-25 19:11:59,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:59,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:11:59,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:59,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:11:59,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:11:59,882 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:59,931 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2021-11-25 19:11:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:11:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-25 19:11:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:59,932 INFO L225 Difference]: With dead ends: 93 [2021-11-25 19:11:59,932 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 19:11:59,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:11:59,933 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:59,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 72 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:11:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 19:11:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2021-11-25 19:11:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-11-25 19:11:59,936 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 16 [2021-11-25 19:11:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:59,937 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-11-25 19:11:59,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:11:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-11-25 19:11:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:11:59,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:59,937 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:59,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:00,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:00,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:00,338 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2021-11-25 19:12:00,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:00,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401632452] [2021-11-25 19:12:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:00,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:00,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:00,340 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:00,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-25 19:12:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:00,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:12:00,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:00,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:00,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:00,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401632452] [2021-11-25 19:12:00,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401632452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:00,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332045265] [2021-11-25 19:12:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:00,553 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:00,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:00,558 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:00,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-25 19:12:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:00,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:12:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:00,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:00,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1332045265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:00,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285496088] [2021-11-25 19:12:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:00,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:00,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:00,806 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:00,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 19:12:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:12:00,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:00,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:00,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285496088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:00,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:00,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 19:12:00,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111669442] [2021-11-25 19:12:00,976 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:00,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:12:00,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:12:00,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:12:00,978 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:01,055 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2021-11-25 19:12:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:12:01,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 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 17 [2021-11-25 19:12:01,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:01,057 INFO L225 Difference]: With dead ends: 120 [2021-11-25 19:12:01,057 INFO L226 Difference]: Without dead ends: 120 [2021-11-25 19:12:01,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:12:01,058 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 153 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:01,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 147 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:12:01,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-25 19:12:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2021-11-25 19:12:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-11-25 19:12:01,062 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 17 [2021-11-25 19:12:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:01,063 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-11-25 19:12:01,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-11-25 19:12:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:12:01,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:01,064 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:01,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:01,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:01,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:01,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:01,682 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2021-11-25 19:12:01,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:01,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376931102] [2021-11-25 19:12:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:01,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:01,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:01,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:01,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-25 19:12:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:01,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:12:01,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:01,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:01,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:01,842 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 19:12:01,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-11-25 19:12:01,851 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 52 treesize of output 50 [2021-11-25 19:12:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:02,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:02,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376931102] [2021-11-25 19:12:02,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376931102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:02,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267329175] [2021-11-25 19:12:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:02,849 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:02,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:02,854 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:02,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-25 19:12:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:02,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:02,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:03,102 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:12:03,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:12:03,115 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 114 treesize of output 110 [2021-11-25 19:12:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:03,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:03,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:03,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267329175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834817608] [2021-11-25 19:12:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:03,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:03,717 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:03,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 19:12:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:03,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:03,847 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:12:03,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:12:03,859 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 52 treesize of output 50 [2021-11-25 19:12:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:04,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:04,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:04,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834817608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:04,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:04,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 15 [2021-11-25 19:12:04,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184272262] [2021-11-25 19:12:04,354 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:04,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:12:04,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:12:04,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:12:04,356 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:04,969 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2021-11-25 19:12:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:12:04,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 19:12:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:04,971 INFO L225 Difference]: With dead ends: 139 [2021-11-25 19:12:04,971 INFO L226 Difference]: Without dead ends: 139 [2021-11-25 19:12:04,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:12:04,972 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 216 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:04,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 142 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 116 Invalid, 0 Unknown, 4 Unchecked, 0.5s Time] [2021-11-25 19:12:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-25 19:12:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2021-11-25 19:12:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 104 states have (on average 1.2788461538461537) internal successors, (133), 112 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2021-11-25 19:12:04,977 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 17 [2021-11-25 19:12:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:04,978 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2021-11-25 19:12:04,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2021-11-25 19:12:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:12:04,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:04,980 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:05,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:05,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-25 19:12:05,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-25 19:12:05,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:05,590 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash -472171212, now seen corresponding path program 2 times [2021-11-25 19:12:05,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:05,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025661620] [2021-11-25 19:12:05,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:05,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:05,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:05,592 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:05,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-25 19:12:05,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:05,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:05,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:12:05,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:05,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:05,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:05,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-11-25 19:12:05,760 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:12:05,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 67 [2021-11-25 19:12:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:06,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:07,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:12:07,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2021-11-25 19:12:07,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:07,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:07,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:07,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025661620] [2021-11-25 19:12:07,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025661620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:07,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [630181790] [2021-11-25 19:12:07,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:07,317 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:07,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:07,318 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:07,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-25 19:12:07,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:07,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:07,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:12:07,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:07,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:07,626 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 19:12:07,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 24 [2021-11-25 19:12:07,660 INFO L354 Elim1Store]: treesize reduction 2, result has 75.0 percent of original size [2021-11-25 19:12:07,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 77 [2021-11-25 19:12:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:08,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:08,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:08,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:08,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [630181790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:08,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933256639] [2021-11-25 19:12:08,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:08,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:08,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:08,694 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:08,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-25 19:12:08,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:08,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:08,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:12:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:08,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:08,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:08,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:08,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-25 19:12:08,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:12:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 123 [2021-11-25 19:12:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:09,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:10,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:10,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:12:10,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933256639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:10,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:10,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 28 [2021-11-25 19:12:10,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918919649] [2021-11-25 19:12:10,512 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:10,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 19:12:10,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 19:12:10,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:12:10,514 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 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) [2021-11-25 19:12:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:13,152 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2021-11-25 19:12:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:12:13,153 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 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 19 [2021-11-25 19:12:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:13,154 INFO L225 Difference]: With dead ends: 145 [2021-11-25 19:12:13,154 INFO L226 Difference]: Without dead ends: 145 [2021-11-25 19:12:13,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=408, Invalid=1074, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:12:13,155 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:13,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 238 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 16 Unchecked, 0.9s Time] [2021-11-25 19:12:13,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-25 19:12:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-25 19:12:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 136 states have (on average 1.2720588235294117) internal successors, (173), 144 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2021-11-25 19:12:13,160 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 19 [2021-11-25 19:12:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:13,160 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2021-11-25 19:12:13,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 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) [2021-11-25 19:12:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2021-11-25 19:12:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:12:13,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:13,162 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] [2021-11-25 19:12:13,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-25 19:12:13,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-25 19:12:13,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-25 19:12:13,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:13,773 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:13,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1860318341, now seen corresponding path program 1 times [2021-11-25 19:12:13,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:13,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171057892] [2021-11-25 19:12:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:13,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:13,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:13,775 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:13,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-25 19:12:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:13,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:13,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:13,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:14,233 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 25 treesize of output 21 [2021-11-25 19:12:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:14,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:14,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171057892] [2021-11-25 19:12:14,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171057892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:14,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1181841102] [2021-11-25 19:12:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:14,299 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:14,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:14,309 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:14,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-25 19:12:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:14,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:14,685 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 25 treesize of output 21 [2021-11-25 19:12:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:14,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1181841102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:14,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446547333] [2021-11-25 19:12:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:14,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:14,720 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:14,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 19:12:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:14,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:14,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:15,063 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 25 treesize of output 21 [2021-11-25 19:12:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:15,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446547333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:15,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:15,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-25 19:12:15,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457195898] [2021-11-25 19:12:15,095 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:15,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:12:15,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:12:15,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:12:15,097 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:15,844 INFO L93 Difference]: Finished difference Result 231 states and 275 transitions. [2021-11-25 19:12:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:12:15,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 19:12:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:15,846 INFO L225 Difference]: With dead ends: 231 [2021-11-25 19:12:15,846 INFO L226 Difference]: Without dead ends: 231 [2021-11-25 19:12:15,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:12:15,847 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 203 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:15,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 122 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:12:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-25 19:12:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 150. [2021-11-25 19:12:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 141 states have (on average 1.2836879432624113) internal successors, (181), 149 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 181 transitions. [2021-11-25 19:12:15,853 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 181 transitions. Word has length 20 [2021-11-25 19:12:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:15,853 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 181 transitions. [2021-11-25 19:12:15,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 181 transitions. [2021-11-25 19:12:15,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:12:15,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:15,854 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] [2021-11-25 19:12:15,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-25 19:12:16,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-25 19:12:16,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:16,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:16,463 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:16,463 INFO L85 PathProgramCache]: Analyzing trace with hash 440503382, now seen corresponding path program 1 times [2021-11-25 19:12:16,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:16,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641639081] [2021-11-25 19:12:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:16,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:16,465 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:16,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-25 19:12:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:16,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:16,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:16,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641639081] [2021-11-25 19:12:16,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641639081] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614694718] [2021-11-25 19:12:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:16,836 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:16,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:16,837 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:16,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-25 19:12:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:17,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:17,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:17,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:17,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [614694718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:17,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612910647] [2021-11-25 19:12:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:17,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:17,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:17,189 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:17,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 19:12:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:12:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:17,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:17,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612910647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:17,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-25 19:12:17,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6, 7, 6] total 12 [2021-11-25 19:12:17,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930985066] [2021-11-25 19:12:17,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:17,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:12:17,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:17,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:12:17,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:12:17,347 INFO L87 Difference]: Start difference. First operand 150 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:17,421 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2021-11-25 19:12:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:12:17,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 19:12:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:17,422 INFO L225 Difference]: With dead ends: 163 [2021-11-25 19:12:17,423 INFO L226 Difference]: Without dead ends: 163 [2021-11-25 19:12:17,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:12:17,424 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 58 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:17,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 68 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:12:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-25 19:12:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2021-11-25 19:12:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 126 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-11-25 19:12:17,428 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 20 [2021-11-25 19:12:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:17,429 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-11-25 19:12:17,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-11-25 19:12:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 19:12:17,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:17,430 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] [2021-11-25 19:12:17,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-25 19:12:17,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-25 19:12:17,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-25 19:12:18,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:18,034 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1835293711, now seen corresponding path program 1 times [2021-11-25 19:12:18,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:18,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078097345] [2021-11-25 19:12:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:18,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:18,038 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:18,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-25 19:12:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:12:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:18,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:18,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:18,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078097345] [2021-11-25 19:12:18,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078097345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:18,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:12:18,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:12:18,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016481403] [2021-11-25 19:12:18,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:18,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:12:18,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:18,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:12:18,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:12:18,210 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:18,313 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2021-11-25 19:12:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:12:18,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-25 19:12:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:18,315 INFO L225 Difference]: With dead ends: 126 [2021-11-25 19:12:18,315 INFO L226 Difference]: Without dead ends: 126 [2021-11-25 19:12:18,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:18,315 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:18,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:12:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-25 19:12:18,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-25 19:12:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 125 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2021-11-25 19:12:18,319 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 21 [2021-11-25 19:12:18,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:18,319 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2021-11-25 19:12:18,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2021-11-25 19:12:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 19:12:18,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:18,320 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] [2021-11-25 19:12:18,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:18,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:18,520 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1835293710, now seen corresponding path program 1 times [2021-11-25 19:12:18,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:18,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765905212] [2021-11-25 19:12:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:18,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:18,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:18,523 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:18,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-25 19:12:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:18,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:18,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:18,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:19,063 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 25 treesize of output 21 [2021-11-25 19:12:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:19,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:19,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765905212] [2021-11-25 19:12:19,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765905212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:19,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1060517627] [2021-11-25 19:12:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:19,206 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:19,206 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:19,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-25 19:12:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:19,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:19,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:19,592 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 25 treesize of output 21 [2021-11-25 19:12:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:19,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1060517627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:19,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172948966] [2021-11-25 19:12:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:19,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:19,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:19,663 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:19,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-25 19:12:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:19,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:19,997 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 25 treesize of output 21 [2021-11-25 19:12:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:20,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172948966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:20,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:20,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-25 19:12:20,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249716175] [2021-11-25 19:12:20,062 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:20,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:12:20,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:12:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:12:20,063 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 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) [2021-11-25 19:12:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:20,873 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2021-11-25 19:12:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:12:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 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 21 [2021-11-25 19:12:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:20,875 INFO L225 Difference]: With dead ends: 208 [2021-11-25 19:12:20,875 INFO L226 Difference]: Without dead ends: 208 [2021-11-25 19:12:20,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:12:20,876 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 269 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:20,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 146 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:12:20,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-25 19:12:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 129. [2021-11-25 19:12:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.2892561983471074) internal successors, (156), 128 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2021-11-25 19:12:20,881 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 21 [2021-11-25 19:12:20,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:20,882 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2021-11-25 19:12:20,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 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) [2021-11-25 19:12:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2021-11-25 19:12:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:12:20,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:20,883 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] [2021-11-25 19:12:20,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:21,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-25 19:12:21,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:21,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:21,498 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:21,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1059572912, now seen corresponding path program 1 times [2021-11-25 19:12:21,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:21,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594982223] [2021-11-25 19:12:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:21,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:21,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:21,501 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:21,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-25 19:12:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:21,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:12:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:21,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:21,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:21,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594982223] [2021-11-25 19:12:21,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594982223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:21,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:12:21,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:12:21,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466036935] [2021-11-25 19:12:21,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:21,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:12:21,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:21,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:12:21,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:21,651 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:21,730 INFO L93 Difference]: Finished difference Result 158 states and 189 transitions. [2021-11-25 19:12:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:12:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 19:12:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:21,732 INFO L225 Difference]: With dead ends: 158 [2021-11-25 19:12:21,732 INFO L226 Difference]: Without dead ends: 158 [2021-11-25 19:12:21,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:12:21,733 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 54 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:21,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:12:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-25 19:12:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2021-11-25 19:12:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 139 states have (on average 1.316546762589928) internal successors, (183), 146 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 183 transitions. [2021-11-25 19:12:21,739 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 183 transitions. Word has length 22 [2021-11-25 19:12:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:21,739 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 183 transitions. [2021-11-25 19:12:21,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 183 transitions. [2021-11-25 19:12:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:12:21,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:21,740 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] [2021-11-25 19:12:21,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:21,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:21,941 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1546450642, now seen corresponding path program 1 times [2021-11-25 19:12:21,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:21,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040655962] [2021-11-25 19:12:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:21,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:21,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:21,942 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:21,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-25 19:12:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:12:22,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:22,075 INFO L354 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2021-11-25 19:12:22,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2021-11-25 19:12:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:22,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:22,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:22,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040655962] [2021-11-25 19:12:22,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040655962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:22,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:12:22,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:12:22,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524218307] [2021-11-25 19:12:22,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:22,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:12:22,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:12:22,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:12:22,125 INFO L87 Difference]: Start difference. First operand 147 states and 183 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:22,197 INFO L93 Difference]: Finished difference Result 146 states and 181 transitions. [2021-11-25 19:12:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:12:22,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 19:12:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:22,199 INFO L225 Difference]: With dead ends: 146 [2021-11-25 19:12:22,199 INFO L226 Difference]: Without dead ends: 146 [2021-11-25 19:12:22,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:22,200 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:22,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 51 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:12:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-25 19:12:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-25 19:12:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 145 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 181 transitions. [2021-11-25 19:12:22,205 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 181 transitions. Word has length 22 [2021-11-25 19:12:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:22,205 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 181 transitions. [2021-11-25 19:12:22,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 181 transitions. [2021-11-25 19:12:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:12:22,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:22,206 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] [2021-11-25 19:12:22,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:22,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:22,418 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1546450643, now seen corresponding path program 1 times [2021-11-25 19:12:22,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005587364] [2021-11-25 19:12:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:22,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:22,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:22,424 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:22,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-25 19:12:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:22,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:22,600 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 19:12:22,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2021-11-25 19:12:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:22,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:22,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:22,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005587364] [2021-11-25 19:12:22,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005587364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:22,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:12:22,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:12:22,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457238141] [2021-11-25 19:12:22,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:22,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:12:22,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:22,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:12:22,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:22,708 INFO L87 Difference]: Start difference. First operand 146 states and 181 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:22,947 INFO L93 Difference]: Finished difference Result 250 states and 315 transitions. [2021-11-25 19:12:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:12:22,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 19:12:22,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:22,949 INFO L225 Difference]: With dead ends: 250 [2021-11-25 19:12:22,949 INFO L226 Difference]: Without dead ends: 250 [2021-11-25 19:12:22,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:12:22,950 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:22,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 121 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:12:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-25 19:12:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 202. [2021-11-25 19:12:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 195 states have (on average 1.323076923076923) internal successors, (258), 201 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 258 transitions. [2021-11-25 19:12:22,957 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 258 transitions. Word has length 22 [2021-11-25 19:12:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:22,958 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 258 transitions. [2021-11-25 19:12:22,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 258 transitions. [2021-11-25 19:12:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:12:22,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:22,959 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] [2021-11-25 19:12:22,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-25 19:12:23,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:23,170 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash 728802193, now seen corresponding path program 1 times [2021-11-25 19:12:23,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:23,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667463612] [2021-11-25 19:12:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:23,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:23,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:23,172 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:23,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-25 19:12:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:12:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:23,336 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-11-25 19:12:23,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2021-11-25 19:12:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:23,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:23,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:23,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667463612] [2021-11-25 19:12:23,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667463612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:23,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:12:23,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:12:23,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783929135] [2021-11-25 19:12:23,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:23,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:12:23,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:23,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:12:23,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:23,653 INFO L87 Difference]: Start difference. First operand 202 states and 258 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:23,681 INFO L93 Difference]: Finished difference Result 229 states and 298 transitions. [2021-11-25 19:12:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:12:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 19:12:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:23,683 INFO L225 Difference]: With dead ends: 229 [2021-11-25 19:12:23,683 INFO L226 Difference]: Without dead ends: 229 [2021-11-25 19:12:23,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:12:23,684 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:23,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-11-25 19:12:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-25 19:12:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2021-11-25 19:12:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.3383084577114428) internal successors, (269), 207 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 269 transitions. [2021-11-25 19:12:23,691 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 269 transitions. Word has length 22 [2021-11-25 19:12:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:23,691 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 269 transitions. [2021-11-25 19:12:23,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 269 transitions. [2021-11-25 19:12:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:12:23,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:23,692 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] [2021-11-25 19:12:23,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:23,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:23,903 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash 88962737, now seen corresponding path program 1 times [2021-11-25 19:12:23,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:23,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428733551] [2021-11-25 19:12:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:23,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:23,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:23,905 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:23,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-25 19:12:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:24,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:12:24,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:24,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:24,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428733551] [2021-11-25 19:12:24,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428733551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:24,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:12:24,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:12:24,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318143617] [2021-11-25 19:12:24,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:24,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:12:24,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:12:24,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:12:24,045 INFO L87 Difference]: Start difference. First operand 208 states and 269 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:24,057 INFO L93 Difference]: Finished difference Result 216 states and 273 transitions. [2021-11-25 19:12:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:12:24,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-11-25 19:12:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:24,059 INFO L225 Difference]: With dead ends: 216 [2021-11-25 19:12:24,059 INFO L226 Difference]: Without dead ends: 216 [2021-11-25 19:12:24,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:12:24,061 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:24,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:12:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-25 19:12:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2021-11-25 19:12:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.3134328358208955) internal successors, (264), 207 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 264 transitions. [2021-11-25 19:12:24,076 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 264 transitions. Word has length 24 [2021-11-25 19:12:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:24,076 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 264 transitions. [2021-11-25 19:12:24,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 264 transitions. [2021-11-25 19:12:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:12:24,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:24,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:24,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:24,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:24,290 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:24,290 INFO L85 PathProgramCache]: Analyzing trace with hash -747793046, now seen corresponding path program 1 times [2021-11-25 19:12:24,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:24,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436959769] [2021-11-25 19:12:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:24,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:24,292 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:24,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-25 19:12:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:12:24,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:24,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:24,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:24,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436959769] [2021-11-25 19:12:24,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436959769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:24,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [959395556] [2021-11-25 19:12:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:24,542 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:24,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:24,542 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:24,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-25 19:12:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:24,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:12:24,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:24,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:24,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [959395556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:24,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142967612] [2021-11-25 19:12:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:24,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:24,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:24,815 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:24,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-25 19:12:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:12:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:24,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:25,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142967612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:25,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:25,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-25 19:12:25,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504967844] [2021-11-25 19:12:25,036 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:25,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:12:25,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:25,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:12:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:12:25,037 INFO L87 Difference]: Start difference. First operand 208 states and 264 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:25,131 INFO L93 Difference]: Finished difference Result 221 states and 269 transitions. [2021-11-25 19:12:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:12:25,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-25 19:12:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:25,133 INFO L225 Difference]: With dead ends: 221 [2021-11-25 19:12:25,133 INFO L226 Difference]: Without dead ends: 221 [2021-11-25 19:12:25,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:12:25,134 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 98 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:25,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 278 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:12:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-25 19:12:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 204. [2021-11-25 19:12:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 197 states have (on average 1.299492385786802) internal successors, (256), 203 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 256 transitions. [2021-11-25 19:12:25,141 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 256 transitions. Word has length 25 [2021-11-25 19:12:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:25,141 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 256 transitions. [2021-11-25 19:12:25,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 256 transitions. [2021-11-25 19:12:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:12:25,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:25,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:25,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-25 19:12:25,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-25 19:12:25,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:25,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:25,754 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:25,754 INFO L85 PathProgramCache]: Analyzing trace with hash -528938328, now seen corresponding path program 1 times [2021-11-25 19:12:25,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:25,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683952402] [2021-11-25 19:12:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:25,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:25,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:25,756 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:25,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-25 19:12:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:25,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:25,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:26,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:26,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:26,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683952402] [2021-11-25 19:12:26,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683952402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:26,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2002966510] [2021-11-25 19:12:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:26,206 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:26,223 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:26,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-25 19:12:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:26,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2002966510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:26,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96606066] [2021-11-25 19:12:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:26,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:26,701 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:26,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-25 19:12:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:26,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:26,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:26,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:26,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96606066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:26,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:26,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 8, 9, 8] total 22 [2021-11-25 19:12:26,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601066909] [2021-11-25 19:12:26,937 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:26,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:12:26,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:12:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:12:26,939 INFO L87 Difference]: Start difference. First operand 204 states and 256 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:27,278 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2021-11-25 19:12:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:12:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-25 19:12:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:27,280 INFO L225 Difference]: With dead ends: 267 [2021-11-25 19:12:27,280 INFO L226 Difference]: Without dead ends: 267 [2021-11-25 19:12:27,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:12:27,281 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 247 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:27,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 312 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:12:27,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-25 19:12:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2021-11-25 19:12:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 234 states have (on average 1.3247863247863247) internal successors, (310), 240 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 310 transitions. [2021-11-25 19:12:27,288 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 310 transitions. Word has length 25 [2021-11-25 19:12:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:27,288 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 310 transitions. [2021-11-25 19:12:27,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 310 transitions. [2021-11-25 19:12:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:12:27,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:27,290 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:27,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:27,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-25 19:12:27,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:27,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:27,912 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:27,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1117279393, now seen corresponding path program 2 times [2021-11-25 19:12:27,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:27,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504138343] [2021-11-25 19:12:27,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:27,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:27,917 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:27,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-25 19:12:28,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:28,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:28,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:12:28,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:28,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:28,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:28,106 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 19:12:28,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-11-25 19:12:28,115 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 52 treesize of output 50 [2021-11-25 19:12:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:28,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:29,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:30,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:30,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504138343] [2021-11-25 19:12:30,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504138343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:30,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1471625800] [2021-11-25 19:12:30,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:30,099 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:30,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:30,106 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:30,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-25 19:12:30,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:30,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:30,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:12:30,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:30,406 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:12:30,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:12:30,423 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 106 treesize of output 102 [2021-11-25 19:12:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:30,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:31,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:31,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1471625800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:31,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991497480] [2021-11-25 19:12:31,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:31,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:31,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:31,515 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:31,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-25 19:12:31,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:31,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:31,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:12:31,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:31,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:31,657 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:12:31,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:12:31,664 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 106 treesize of output 102 [2021-11-25 19:12:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:31,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:32,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991497480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:32,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:32,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 22 [2021-11-25 19:12:32,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188435722] [2021-11-25 19:12:32,409 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:32,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 19:12:32,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 19:12:32,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:12:32,410 INFO L87 Difference]: Start difference. First operand 241 states and 310 transitions. Second operand has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:36,117 INFO L93 Difference]: Finished difference Result 471 states and 608 transitions. [2021-11-25 19:12:36,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:12:36,119 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-25 19:12:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:36,122 INFO L225 Difference]: With dead ends: 471 [2021-11-25 19:12:36,122 INFO L226 Difference]: Without dead ends: 471 [2021-11-25 19:12:36,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=306, Invalid=750, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:12:36,123 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 326 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:36,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 433 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 417 Invalid, 0 Unknown, 7 Unchecked, 2.1s Time] [2021-11-25 19:12:36,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-25 19:12:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 273. [2021-11-25 19:12:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 266 states have (on average 1.3157894736842106) internal successors, (350), 272 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 350 transitions. [2021-11-25 19:12:36,133 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 350 transitions. Word has length 25 [2021-11-25 19:12:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:36,133 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 350 transitions. [2021-11-25 19:12:36,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 350 transitions. [2021-11-25 19:12:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:12:36,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:36,135 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] [2021-11-25 19:12:36,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:36,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-25 19:12:36,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-11-25 19:12:36,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:36,750 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1840804201, now seen corresponding path program 1 times [2021-11-25 19:12:36,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:36,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722879560] [2021-11-25 19:12:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:36,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:36,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:36,752 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:36,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-25 19:12:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:12:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:36,949 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-11-25 19:12:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2021-11-25 19:12:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:12:37,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:37,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722879560] [2021-11-25 19:12:37,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722879560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:37,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:12:37,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:12:37,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239086298] [2021-11-25 19:12:37,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:37,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:12:37,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:37,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:12:37,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:37,231 INFO L87 Difference]: Start difference. First operand 273 states and 350 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:37,251 INFO L93 Difference]: Finished difference Result 323 states and 418 transitions. [2021-11-25 19:12:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:12:37,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 19:12:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:37,253 INFO L225 Difference]: With dead ends: 323 [2021-11-25 19:12:37,253 INFO L226 Difference]: Without dead ends: 323 [2021-11-25 19:12:37,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:12:37,254 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:37,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2021-11-25 19:12:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-25 19:12:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 227. [2021-11-25 19:12:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 220 states have (on average 1.3363636363636364) internal successors, (294), 226 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 294 transitions. [2021-11-25 19:12:37,262 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 294 transitions. Word has length 26 [2021-11-25 19:12:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:37,262 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 294 transitions. [2021-11-25 19:12:37,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 294 transitions. [2021-11-25 19:12:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 19:12:37,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:37,263 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] [2021-11-25 19:12:37,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-25 19:12:37,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:37,475 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:37,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1854162937, now seen corresponding path program 1 times [2021-11-25 19:12:37,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:37,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574819796] [2021-11-25 19:12:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:37,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:37,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:37,476 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:37,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-25 19:12:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:37,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:37,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:37,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:37,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574819796] [2021-11-25 19:12:37,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574819796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:37,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2099488809] [2021-11-25 19:12:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:37,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:37,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:37,946 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:37,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-11-25 19:12:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:38,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:38,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:38,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2099488809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:38,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864256169] [2021-11-25 19:12:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:38,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:38,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:38,410 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:38,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-25 19:12:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:38,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:38,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:38,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:38,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864256169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:38,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:38,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 8, 8, 7] total 16 [2021-11-25 19:12:38,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851005502] [2021-11-25 19:12:38,743 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:38,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:12:38,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:12:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:12:38,744 INFO L87 Difference]: Start difference. First operand 227 states and 294 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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) [2021-11-25 19:12:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:39,119 INFO L93 Difference]: Finished difference Result 233 states and 276 transitions. [2021-11-25 19:12:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:12:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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 27 [2021-11-25 19:12:39,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:39,121 INFO L225 Difference]: With dead ends: 233 [2021-11-25 19:12:39,121 INFO L226 Difference]: Without dead ends: 233 [2021-11-25 19:12:39,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:12:39,122 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 273 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:39,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 215 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:12:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-25 19:12:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 186. [2021-11-25 19:12:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.25) internal successors, (225), 185 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 225 transitions. [2021-11-25 19:12:39,128 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 225 transitions. Word has length 27 [2021-11-25 19:12:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:39,129 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 225 transitions. [2021-11-25 19:12:39,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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) [2021-11-25 19:12:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 225 transitions. [2021-11-25 19:12:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:12:39,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:39,130 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] [2021-11-25 19:12:39,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:39,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2021-11-25 19:12:39,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:39,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:39,742 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:39,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:39,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1314778955, now seen corresponding path program 1 times [2021-11-25 19:12:39,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:39,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306225891] [2021-11-25 19:12:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:39,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:39,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:39,743 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:39,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-25 19:12:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:39,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:12:39,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:12:41,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:41,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:41,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306225891] [2021-11-25 19:12:41,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306225891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:41,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:12:41,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:12:41,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801384240] [2021-11-25 19:12:41,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:41,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:12:41,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:12:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:41,581 INFO L87 Difference]: Start difference. First operand 186 states and 225 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:41,597 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2021-11-25 19:12:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:12:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-25 19:12:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:41,598 INFO L225 Difference]: With dead ends: 190 [2021-11-25 19:12:41,598 INFO L226 Difference]: Without dead ends: 188 [2021-11-25 19:12:41,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:41,599 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:41,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2021-11-25 19:12:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-25 19:12:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-11-25 19:12:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.238888888888889) internal successors, (223), 185 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 223 transitions. [2021-11-25 19:12:41,604 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 223 transitions. Word has length 28 [2021-11-25 19:12:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:41,605 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 223 transitions. [2021-11-25 19:12:41,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 223 transitions. [2021-11-25 19:12:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:12:41,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:41,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:41,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-11-25 19:12:41,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:41,818 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:41,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1314778088, now seen corresponding path program 1 times [2021-11-25 19:12:41,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:41,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593935372] [2021-11-25 19:12:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:41,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:41,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:41,820 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:41,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-25 19:12:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:12:41,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:12:42,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:12:42,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:42,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593935372] [2021-11-25 19:12:42,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593935372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757425245] [2021-11-25 19:12:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:42,161 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:42,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:42,161 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:42,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-11-25 19:12:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:12:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:12:42,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:12:42,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1757425245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297293386] [2021-11-25 19:12:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:42,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:42,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:42,465 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:42,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-25 19:12:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:12:42,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:12:42,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:12:42,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297293386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:42,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:42,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 19:12:42,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555938552] [2021-11-25 19:12:42,727 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:42,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:12:42,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:42,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:12:42,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:12:42,728 INFO L87 Difference]: Start difference. First operand 186 states and 223 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:42,810 INFO L93 Difference]: Finished difference Result 264 states and 308 transitions. [2021-11-25 19:12:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:12:42,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-25 19:12:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:42,813 INFO L225 Difference]: With dead ends: 264 [2021-11-25 19:12:42,813 INFO L226 Difference]: Without dead ends: 256 [2021-11-25 19:12:42,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:12:42,814 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:42,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 167 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:12:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-25 19:12:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 245. [2021-11-25 19:12:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 239 states have (on average 1.2217573221757323) internal successors, (292), 244 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 292 transitions. [2021-11-25 19:12:42,820 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 292 transitions. Word has length 28 [2021-11-25 19:12:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:42,821 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 292 transitions. [2021-11-25 19:12:42,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 292 transitions. [2021-11-25 19:12:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:12:42,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:42,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:42,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2021-11-25 19:12:43,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2021-11-25 19:12:43,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:43,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:43,433 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1252738474, now seen corresponding path program 1 times [2021-11-25 19:12:43,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:43,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732602398] [2021-11-25 19:12:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:43,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:43,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:43,435 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:43,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-25 19:12:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:43,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:43,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:43,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:43,875 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:43,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732602398] [2021-11-25 19:12:43,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732602398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:43,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1994553929] [2021-11-25 19:12:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:43,876 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:43,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:43,877 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:43,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2021-11-25 19:12:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:44,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:44,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:44,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1994553929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:44,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574855438] [2021-11-25 19:12:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:44,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:44,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:44,274 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:44,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-25 19:12:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:44,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:44,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574855438] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:44,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:44,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 13 [2021-11-25 19:12:44,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140722229] [2021-11-25 19:12:44,605 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:44,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:12:44,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:44,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:12:44,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:12:44,606 INFO L87 Difference]: Start difference. First operand 245 states and 292 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:44,879 INFO L93 Difference]: Finished difference Result 323 states and 377 transitions. [2021-11-25 19:12:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:12:44,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-25 19:12:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:44,883 INFO L225 Difference]: With dead ends: 323 [2021-11-25 19:12:44,883 INFO L226 Difference]: Without dead ends: 315 [2021-11-25 19:12:44,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:12:44,884 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:44,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 255 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:12:44,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-25 19:12:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 245. [2021-11-25 19:12:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 239 states have (on average 1.2217573221757323) internal successors, (292), 244 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 292 transitions. [2021-11-25 19:12:44,891 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 292 transitions. Word has length 28 [2021-11-25 19:12:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:44,891 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 292 transitions. [2021-11-25 19:12:44,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 292 transitions. [2021-11-25 19:12:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:12:44,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:44,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:44,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:45,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:45,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:45,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:45,495 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1138703979, now seen corresponding path program 2 times [2021-11-25 19:12:45,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493918538] [2021-11-25 19:12:45,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:45,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:45,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:45,498 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:45,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-11-25 19:12:45,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:45,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:45,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:45,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:45,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:46,252 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 27 treesize of output 23 [2021-11-25 19:12:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:46,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:46,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493918538] [2021-11-25 19:12:46,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493918538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:46,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [224280402] [2021-11-25 19:12:46,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:46,579 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:46,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:46,580 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:46,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2021-11-25 19:12:46,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:46,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:46,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 19:12:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:46,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:46,888 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:12:46,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:12:46,897 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 122 treesize of output 118 [2021-11-25 19:12:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:47,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:48,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:48,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [224280402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624192349] [2021-11-25 19:12:48,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:48,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:48,690 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:48,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-25 19:12:48,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:48,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:48,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:49,112 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 27 treesize of output 23 [2021-11-25 19:12:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:12:49,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624192349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:49,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:49,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 10, 8, 8] total 30 [2021-11-25 19:12:49,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844213615] [2021-11-25 19:12:49,221 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:49,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 19:12:49,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:49,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 19:12:49,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:12:49,222 INFO L87 Difference]: Start difference. First operand 245 states and 292 transitions. Second operand has 31 states, 30 states have (on average 3.2) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:52,077 INFO L93 Difference]: Finished difference Result 440 states and 511 transitions. [2021-11-25 19:12:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 19:12:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 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 [2021-11-25 19:12:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:52,080 INFO L225 Difference]: With dead ends: 440 [2021-11-25 19:12:52,080 INFO L226 Difference]: Without dead ends: 440 [2021-11-25 19:12:52,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 19:12:52,082 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 326 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:52,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 595 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 400 Invalid, 0 Unknown, 48 Unchecked, 1.5s Time] [2021-11-25 19:12:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-25 19:12:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 294. [2021-11-25 19:12:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 288 states have (on average 1.2430555555555556) internal successors, (358), 293 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 358 transitions. [2021-11-25 19:12:52,090 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 358 transitions. Word has length 29 [2021-11-25 19:12:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:52,090 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 358 transitions. [2021-11-25 19:12:52,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 358 transitions. [2021-11-25 19:12:52,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 19:12:52,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:52,092 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] [2021-11-25 19:12:52,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-11-25 19:12:52,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-11-25 19:12:52,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:52,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:52,710 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1019375167, now seen corresponding path program 1 times [2021-11-25 19:12:52,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:52,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135696581] [2021-11-25 19:12:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:52,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:52,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:52,712 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:52,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-11-25 19:12:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:52,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:12:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:12:54,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:54,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135696581] [2021-11-25 19:12:54,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135696581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:54,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:12:54,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:12:54,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178071498] [2021-11-25 19:12:54,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:54,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:12:54,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:54,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:12:54,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:54,713 INFO L87 Difference]: Start difference. First operand 294 states and 358 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:54,722 INFO L93 Difference]: Finished difference Result 293 states and 357 transitions. [2021-11-25 19:12:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:12:54,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-25 19:12:54,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:54,724 INFO L225 Difference]: With dead ends: 293 [2021-11-25 19:12:54,724 INFO L226 Difference]: Without dead ends: 266 [2021-11-25 19:12:54,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:54,725 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:54,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 89 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-11-25 19:12:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-25 19:12:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-11-25 19:12:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.2375478927203065) internal successors, (323), 265 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 323 transitions. [2021-11-25 19:12:54,731 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 323 transitions. Word has length 31 [2021-11-25 19:12:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:54,732 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 323 transitions. [2021-11-25 19:12:54,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:12:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 323 transitions. [2021-11-25 19:12:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 19:12:54,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:54,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:54,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:54,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:54,945 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:12:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash -112944909, now seen corresponding path program 2 times [2021-11-25 19:12:54,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:54,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109897165] [2021-11-25 19:12:54,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:54,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:54,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:54,947 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:54,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-25 19:12:55,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:55,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:55,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:55,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:55,782 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 27 treesize of output 23 [2021-11-25 19:12:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:56,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109897165] [2021-11-25 19:12:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109897165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [136798236] [2021-11-25 19:12:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:56,021 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:56,022 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:56,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2021-11-25 19:12:56,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:56,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:56,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:12:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:56,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:56,339 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 19:12:56,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 24 [2021-11-25 19:12:56,358 INFO L354 Elim1Store]: treesize reduction 2, result has 75.0 percent of original size [2021-11-25 19:12:56,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 75 [2021-11-25 19:12:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:57,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:58,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:58,646 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 15 treesize of output 13 [2021-11-25 19:12:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:58,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [136798236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:58,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407171974] [2021-11-25 19:12:58,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:58,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:58,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:58,653 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:58,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-25 19:12:58,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:58,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:59,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:59,376 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 27 treesize of output 23 [2021-11-25 19:12:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:12:59,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407171974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:59,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:59,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9, 8, 6, 6] total 23 [2021-11-25 19:12:59,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542552140] [2021-11-25 19:12:59,455 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:59,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:12:59,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:12:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:12:59,457 INFO L87 Difference]: Start difference. First operand 266 states and 323 transitions. Second operand has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:01,941 INFO L93 Difference]: Finished difference Result 462 states and 555 transitions. [2021-11-25 19:13:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 19:13:01,942 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-25 19:13:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:01,944 INFO L225 Difference]: With dead ends: 462 [2021-11-25 19:13:01,944 INFO L226 Difference]: Without dead ends: 462 [2021-11-25 19:13:01,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:13:01,945 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 104 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:01,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 331 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 86 Unchecked, 0.6s Time] [2021-11-25 19:13:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-25 19:13:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 346. [2021-11-25 19:13:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 341 states have (on average 1.2375366568914956) internal successors, (422), 345 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 422 transitions. [2021-11-25 19:13:01,954 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 422 transitions. Word has length 32 [2021-11-25 19:13:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:01,954 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 422 transitions. [2021-11-25 19:13:01,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 422 transitions. [2021-11-25 19:13:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 19:13:01,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:01,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:01,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:02,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:02,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:02,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:13:02,567 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:13:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1409463453, now seen corresponding path program 3 times [2021-11-25 19:13:02,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:13:02,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66848332] [2021-11-25 19:13:02,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:13:02,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:13:02,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:13:02,569 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:13:02,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-25 19:13:02,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:13:02,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:13:02,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:13:02,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:02,782 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 19:13:02,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-11-25 19:13:02,788 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 122 treesize of output 118 [2021-11-25 19:13:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:13:03,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:04,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:13:04,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:13:04,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66848332] [2021-11-25 19:13:04,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66848332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:04,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1422718883] [2021-11-25 19:13:04,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:13:04,686 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:13:04,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:13:04,687 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:13:04,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2021-11-25 19:13:04,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:13:04,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:13:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:13:04,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:05,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:05,023 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:13:05,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:13:05,031 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 52 treesize of output 50 [2021-11-25 19:13:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:13:05,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:07,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:13:07,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1422718883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:07,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559351412] [2021-11-25 19:13:07,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:13:07,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:07,065 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:13:07,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-25 19:13:07,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:13:07,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:13:07,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:13:07,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:13:08,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:13:09,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559351412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:09,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:13:09,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 14, 12] total 43 [2021-11-25 19:13:09,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53237501] [2021-11-25 19:13:09,602 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:13:09,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 19:13:09,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:13:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 19:13:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 19:13:09,604 INFO L87 Difference]: Start difference. First operand 346 states and 422 transitions. Second operand has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:16,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:18,606 INFO L93 Difference]: Finished difference Result 551 states and 642 transitions. [2021-11-25 19:13:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-25 19:13:18,607 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 33 [2021-11-25 19:13:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:18,609 INFO L225 Difference]: With dead ends: 551 [2021-11-25 19:13:18,609 INFO L226 Difference]: Without dead ends: 540 [2021-11-25 19:13:18,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=957, Invalid=4445, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 19:13:18,612 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 903 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:18,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 702 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 970 Invalid, 0 Unknown, 33 Unchecked, 4.5s Time] [2021-11-25 19:13:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-25 19:13:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 413. [2021-11-25 19:13:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 408 states have (on average 1.2377450980392157) internal successors, (505), 412 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 505 transitions. [2021-11-25 19:13:18,623 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 505 transitions. Word has length 33 [2021-11-25 19:13:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:18,623 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 505 transitions. [2021-11-25 19:13:18,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 505 transitions. [2021-11-25 19:13:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:13:18,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:18,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:18,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:18,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2021-11-25 19:13:19,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:19,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:13:19,238 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:13:19,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:19,239 INFO L85 PathProgramCache]: Analyzing trace with hash -54518167, now seen corresponding path program 1 times [2021-11-25 19:13:19,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:13:19,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675037009] [2021-11-25 19:13:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:19,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:13:19,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:13:19,240 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:13:19,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-11-25 19:13:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:13:19,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:13:19,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:20,158 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 27 treesize of output 23 [2021-11-25 19:13:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:13:20,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:13:20,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675037009] [2021-11-25 19:13:20,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675037009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:20,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207188232] [2021-11-25 19:13:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:20,423 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:13:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:13:20,424 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:13:20,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2021-11-25 19:13:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:20,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:13:20,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:13:20,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:21,181 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 27 treesize of output 23 [2021-11-25 19:13:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:13:21,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [207188232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:21,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464070953] [2021-11-25 19:13:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:21,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:21,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:21,279 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:13:21,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-25 19:13:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:13:21,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:13:21,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:21,943 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 27 treesize of output 23 [2021-11-25 19:13:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:13:22,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464070953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:22,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:13:22,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-25 19:13:22,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115212940] [2021-11-25 19:13:22,033 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:13:22,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:13:22,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:13:22,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:13:22,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:13:22,034 INFO L87 Difference]: Start difference. First operand 413 states and 505 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:23,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:23,692 INFO L93 Difference]: Finished difference Result 1416 states and 1736 transitions. [2021-11-25 19:13:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:13:23,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2021-11-25 19:13:23,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:23,698 INFO L225 Difference]: With dead ends: 1416 [2021-11-25 19:13:23,698 INFO L226 Difference]: Without dead ends: 1416 [2021-11-25 19:13:23,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:13:23,699 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 600 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:23,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 221 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:13:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-11-25 19:13:23,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 406. [2021-11-25 19:13:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 1.2219451371571073) internal successors, (490), 405 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 490 transitions. [2021-11-25 19:13:23,713 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 490 transitions. Word has length 35 [2021-11-25 19:13:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:23,714 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 490 transitions. [2021-11-25 19:13:23,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 490 transitions. [2021-11-25 19:13:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:13:23,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:23,715 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:23,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2021-11-25 19:13:23,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:24,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2021-11-25 19:13:24,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:13:24,346 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:13:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1249695552, now seen corresponding path program 3 times [2021-11-25 19:13:24,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:13:24,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607670513] [2021-11-25 19:13:24,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:13:24,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:13:24,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:13:24,348 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:13:24,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-11-25 19:13:24,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 19:13:24,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:13:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:13:24,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:24,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:24,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:24,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-11-25 19:13:24,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:13:24,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 73 [2021-11-25 19:13:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:25,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:27,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:27,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:27,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:13:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607670513] [2021-11-25 19:13:27,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607670513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [202025982] [2021-11-25 19:13:27,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:13:27,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:13:27,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:13:27,941 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:13:27,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2021-11-25 19:13:28,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 19:13:28,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:13:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:13:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:28,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:28,536 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 19:13:28,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 24 [2021-11-25 19:13:28,559 INFO L354 Elim1Store]: treesize reduction 2, result has 75.0 percent of original size [2021-11-25 19:13:28,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 145 [2021-11-25 19:13:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:30,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:37,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:37,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:37,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [202025982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:37,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99309055] [2021-11-25 19:13:37,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:13:37,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:37,320 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:13:37,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-25 19:13:39,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 19:13:39,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:13:39,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:13:39,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:39,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:39,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:39,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-25 19:13:39,116 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:13:39,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 137 [2021-11-25 19:13:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:40,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:45,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:45,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:45,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99309055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:45,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:13:45,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15, 15, 14, 14] total 62 [2021-11-25 19:13:45,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295679869] [2021-11-25 19:13:45,363 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:13:45,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-25 19:13:45,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:13:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-25 19:13:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=2872, Unknown=0, NotChecked=0, Total=3906 [2021-11-25 19:13:45,366 INFO L87 Difference]: Start difference. First operand 406 states and 490 transitions. Second operand has 63 states, 62 states have (on average 2.8548387096774195) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:57,978 INFO L93 Difference]: Finished difference Result 470 states and 570 transitions. [2021-11-25 19:13:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 19:13:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.8548387096774195) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 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 [2021-11-25 19:13:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:57,980 INFO L225 Difference]: With dead ends: 470 [2021-11-25 19:13:57,980 INFO L226 Difference]: Without dead ends: 470 [2021-11-25 19:13:57,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 146 SyntacticMatches, 9 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=2039, Invalid=5101, Unknown=0, NotChecked=0, Total=7140 [2021-11-25 19:13:57,983 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 80 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:57,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 558 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 108 Unchecked, 0.0s Time] [2021-11-25 19:13:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-25 19:13:57,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2021-11-25 19:13:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.2258064516129032) internal successors, (570), 469 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 570 transitions. [2021-11-25 19:13:57,991 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 570 transitions. Word has length 35 [2021-11-25 19:13:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:57,992 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 570 transitions. [2021-11-25 19:13:57,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.8548387096774195) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 570 transitions. [2021-11-25 19:13:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:13:57,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:57,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:58,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:58,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2021-11-25 19:13:58,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-11-25 19:13:58,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:58,606 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:13:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:58,606 INFO L85 PathProgramCache]: Analyzing trace with hash -524293744, now seen corresponding path program 3 times [2021-11-25 19:13:58,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:13:58,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877950612] [2021-11-25 19:13:58,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:13:58,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:13:58,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:13:58,611 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:13:58,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-11-25 19:13:58,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:13:58,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:13:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 19:13:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:58,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:58,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:58,936 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:13:58,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-11-25 19:13:58,960 INFO L354 Elim1Store]: treesize reduction 2, result has 75.0 percent of original size [2021-11-25 19:13:58,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 77 [2021-11-25 19:13:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:13:59,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:14:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:14:02,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:14:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877950612] [2021-11-25 19:14:02,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877950612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:14:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1766754456] [2021-11-25 19:14:02,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:14:02,804 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:14:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:14:02,805 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:14:02,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2021-11-25 19:14:03,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:14:03,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:14:03,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 19:14:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:14:03,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:03,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:03,346 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:14:03,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-11-25 19:14:03,377 INFO L354 Elim1Store]: treesize reduction 2, result has 75.0 percent of original size [2021-11-25 19:14:03,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 81 [2021-11-25 19:14:03,892 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 22 treesize of output 16 [2021-11-25 19:14:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:14:04,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:14:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:14:06,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1766754456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:14:06,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180118442] [2021-11-25 19:14:06,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:14:06,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:14:06,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:14:06,211 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:14:06,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-25 19:14:06,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:14:06,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:14:06,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:14:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:14:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:14:07,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:14:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:14:07,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180118442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:14:07,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:14:07,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 11, 11, 10] total 44 [2021-11-25 19:14:07,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116597357] [2021-11-25 19:14:07,715 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:14:07,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-25 19:14:07,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:14:07,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-25 19:14:07,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1588, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 19:14:07,716 INFO L87 Difference]: Start difference. First operand 470 states and 570 transitions. Second operand has 44 states, 44 states have (on average 3.977272727272727) internal successors, (175), 44 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:14:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:14:16,121 INFO L93 Difference]: Finished difference Result 875 states and 1049 transitions. [2021-11-25 19:14:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 19:14:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.977272727272727) internal successors, (175), 44 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-25 19:14:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:14:16,124 INFO L225 Difference]: With dead ends: 875 [2021-11-25 19:14:16,124 INFO L226 Difference]: Without dead ends: 805 [2021-11-25 19:14:16,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=745, Invalid=3161, Unknown=0, NotChecked=0, Total=3906 [2021-11-25 19:14:16,125 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 725 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:14:16,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 668 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 19:14:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-11-25 19:14:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 754. [2021-11-25 19:14:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 749 states have (on average 1.2216288384512684) internal successors, (915), 753 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:14:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 915 transitions. [2021-11-25 19:14:16,138 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 915 transitions. Word has length 40 [2021-11-25 19:14:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:14:16,139 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 915 transitions. [2021-11-25 19:14:16,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.977272727272727) internal successors, (175), 44 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:14:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 915 transitions. [2021-11-25 19:14:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:14:16,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:14:16,140 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:14:16,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-11-25 19:14:16,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2021-11-25 19:14:16,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-25 19:14:16,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:14:16,753 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:14:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:14:16,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1396579989, now seen corresponding path program 3 times [2021-11-25 19:14:16,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:14:16,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964670801] [2021-11-25 19:14:16,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:14:16,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:14:16,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:14:16,755 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:14:16,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-25 19:14:16,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 19:14:16,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:14:16,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 19:14:16,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:14:17,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:17,028 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:14:17,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:14:17,036 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 48 treesize of output 46 [2021-11-25 19:14:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:14:17,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:14:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:14:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:14:21,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:14:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964670801] [2021-11-25 19:14:21,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964670801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:14:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1713039655] [2021-11-25 19:14:21,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:14:21,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:14:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:14:21,697 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:14:21,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2021-11-25 19:14:22,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 19:14:22,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:14:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:14:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:14:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:22,303 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:14:22,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:14:22,312 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 52 treesize of output 50 [2021-11-25 19:14:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:14:23,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:14:30,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:14:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:14:30,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1713039655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:14:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071465808] [2021-11-25 19:14:30,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:14:30,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:14:30,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:14:30,872 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:14:30,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-25 19:14:32,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 19:14:32,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:14:32,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:14:32,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:14:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:32,565 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:14:32,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:14:32,577 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 48 treesize of output 46 [2021-11-25 19:14:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:14:33,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:14:36,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:14:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:14:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071465808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:14:36,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:14:36,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 16, 16, 13, 13] total 48 [2021-11-25 19:14:36,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709496193] [2021-11-25 19:14:36,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:14:36,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-25 19:14:36,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:14:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-25 19:14:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2021-11-25 19:14:36,652 INFO L87 Difference]: Start difference. First operand 754 states and 915 transitions. Second operand has 49 states, 48 states have (on average 3.2291666666666665) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:14:42,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:44,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:46,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:51,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:53,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:55,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:59,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:01,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:03,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:06,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:15,390 INFO L93 Difference]: Finished difference Result 4258 states and 5297 transitions. [2021-11-25 19:15:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 19:15:15,391 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.2291666666666665) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 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 41 [2021-11-25 19:15:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:15,409 INFO L225 Difference]: With dead ends: 4258 [2021-11-25 19:15:15,409 INFO L226 Difference]: Without dead ends: 4258 [2021-11-25 19:15:15,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=1263, Invalid=3429, Unknown=0, NotChecked=0, Total=4692 [2021-11-25 19:15:15,411 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2141 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 71 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2141 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:15,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2141 Valid, 1096 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1273 Invalid, 8 Unknown, 15 Unchecked, 25.6s Time] [2021-11-25 19:15:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2021-11-25 19:15:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 850. [2021-11-25 19:15:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 845 states have (on average 1.2248520710059172) internal successors, (1035), 849 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1035 transitions. [2021-11-25 19:15:15,445 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1035 transitions. Word has length 41 [2021-11-25 19:15:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:15,445 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1035 transitions. [2021-11-25 19:15:15,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.2291666666666665) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1035 transitions. [2021-11-25 19:15:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:15:15,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:15,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:15,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (85)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:15,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:15,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-11-25 19:15:16,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:16,054 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:15:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash 829184327, now seen corresponding path program 1 times [2021-11-25 19:15:16,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:16,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789661153] [2021-11-25 19:15:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:16,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:16,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:16,056 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:16,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-11-25 19:15:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:16,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:15:16,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:16,356 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-11-25 19:15:16,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2021-11-25 19:15:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:15:16,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:15:18,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:18,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789661153] [2021-11-25 19:15:18,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789661153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [757532484] [2021-11-25 19:15:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:18,064 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:15:18,065 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:15:18,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2021-11-25 19:15:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:18,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:15:18,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:18,490 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-11-25 19:15:18,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2021-11-25 19:15:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:15:19,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:15:20,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [757532484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:20,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646225606] [2021-11-25 19:15:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:20,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:20,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:20,632 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:20,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-25 19:15:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:20,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:15:20,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:20,936 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-11-25 19:15:20,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2021-11-25 19:15:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:15:21,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:15:22,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646225606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:22,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:15:22,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 8, 7, 7] total 25 [2021-11-25 19:15:22,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880743747] [2021-11-25 19:15:22,167 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:15:22,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 19:15:22,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:15:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 19:15:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:15:22,169 INFO L87 Difference]: Start difference. First operand 850 states and 1035 transitions. Second operand has 26 states, 25 states have (on average 5.28) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:23,003 INFO L93 Difference]: Finished difference Result 966 states and 1164 transitions. [2021-11-25 19:15:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:15:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.28) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 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 41 [2021-11-25 19:15:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:23,008 INFO L225 Difference]: With dead ends: 966 [2021-11-25 19:15:23,008 INFO L226 Difference]: Without dead ends: 917 [2021-11-25 19:15:23,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:15:23,009 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 199 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:23,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 414 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 162 Invalid, 0 Unknown, 50 Unchecked, 0.6s Time] [2021-11-25 19:15:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-25 19:15:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 863. [2021-11-25 19:15:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 858 states have (on average 1.2261072261072261) internal successors, (1052), 862 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1052 transitions. [2021-11-25 19:15:23,026 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1052 transitions. Word has length 41 [2021-11-25 19:15:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:23,026 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1052 transitions. [2021-11-25 19:15:23,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.28) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1052 transitions. [2021-11-25 19:15:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:15:23,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:23,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:23,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:23,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2021-11-25 19:15:23,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2021-11-25 19:15:23,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:15:23,650 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:15:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:23,651 INFO L85 PathProgramCache]: Analyzing trace with hash -240796018, now seen corresponding path program 4 times [2021-11-25 19:15:23,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:23,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217654576] [2021-11-25 19:15:23,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:15:23,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:23,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:23,652 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:23,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-11-25 19:15:23,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:15:23,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:23,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:15:23,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:15:24,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:15:24,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:24,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217654576] [2021-11-25 19:15:24,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217654576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:24,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2067962740] [2021-11-25 19:15:24,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:15:24,711 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:24,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:15:24,711 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:15:24,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2021-11-25 19:15:25,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:15:25,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:25,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:15:25,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:15:25,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:15:25,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2067962740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:25,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571252503] [2021-11-25 19:15:25,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:15:25,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:25,611 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:25,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-25 19:15:25,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:15:25,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:25,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:15:25,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:15:25,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:15:26,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571252503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:26,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:15:26,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13, 12, 13, 12] total 31 [2021-11-25 19:15:26,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154896745] [2021-11-25 19:15:26,141 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:15:26,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 19:15:26,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:15:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 19:15:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:15:26,144 INFO L87 Difference]: Start difference. First operand 863 states and 1052 transitions. Second operand has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:28,166 INFO L93 Difference]: Finished difference Result 2037 states and 2390 transitions. [2021-11-25 19:15:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-25 19:15:28,167 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-25 19:15:28,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:28,173 INFO L225 Difference]: With dead ends: 2037 [2021-11-25 19:15:28,173 INFO L226 Difference]: Without dead ends: 1961 [2021-11-25 19:15:28,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=766, Invalid=2656, Unknown=0, NotChecked=0, Total=3422 [2021-11-25 19:15:28,175 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 737 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:28,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 1348 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:15:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-11-25 19:15:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1477. [2021-11-25 19:15:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1472 states have (on average 1.2377717391304348) internal successors, (1822), 1476 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1822 transitions. [2021-11-25 19:15:28,197 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1822 transitions. Word has length 49 [2021-11-25 19:15:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:28,198 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 1822 transitions. [2021-11-25 19:15:28,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1822 transitions. [2021-11-25 19:15:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:15:28,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:28,200 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:28,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2021-11-25 19:15:28,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:28,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (91)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:28,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:28,813 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:15:28,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1022969014, now seen corresponding path program 4 times [2021-11-25 19:15:28,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:28,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61262930] [2021-11-25 19:15:28,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:15:28,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:28,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:28,815 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:28,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2021-11-25 19:15:29,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:15:29,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:29,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:15:29,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:29,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:30,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:30,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61262930] [2021-11-25 19:15:30,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61262930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:30,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2032560443] [2021-11-25 19:15:30,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:15:30,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:30,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:15:30,125 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:15:30,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2021-11-25 19:15:30,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:15:30,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:30,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:15:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:31,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:31,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2032560443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757271397] [2021-11-25 19:15:31,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:15:31,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:31,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:31,395 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:31,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-25 19:15:31,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:15:31,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:15:31,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:31,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:32,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757271397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:32,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:15:32,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12, 11, 13, 12] total 33 [2021-11-25 19:15:32,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474721204] [2021-11-25 19:15:32,226 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:15:32,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 19:15:32,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:15:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 19:15:32,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:15:32,227 INFO L87 Difference]: Start difference. First operand 1477 states and 1822 transitions. Second operand has 33 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:33,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:33,375 INFO L93 Difference]: Finished difference Result 2535 states and 3098 transitions. [2021-11-25 19:15:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:15:33,377 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 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 52 [2021-11-25 19:15:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:33,384 INFO L225 Difference]: With dead ends: 2535 [2021-11-25 19:15:33,384 INFO L226 Difference]: Without dead ends: 2217 [2021-11-25 19:15:33,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:15:33,385 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 727 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:33,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 915 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:15:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-11-25 19:15:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 1930. [2021-11-25 19:15:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1925 states have (on average 1.2342857142857142) internal successors, (2376), 1929 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2376 transitions. [2021-11-25 19:15:33,423 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2376 transitions. Word has length 52 [2021-11-25 19:15:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:33,424 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 2376 transitions. [2021-11-25 19:15:33,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2376 transitions. [2021-11-25 19:15:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:15:33,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:33,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:33,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (94)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:33,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-11-25 19:15:33,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (93)] Ended with exit code 0 [2021-11-25 19:15:34,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:15:34,031 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:15:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:34,031 INFO L85 PathProgramCache]: Analyzing trace with hash -878193103, now seen corresponding path program 2 times [2021-11-25 19:15:34,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:34,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731025355] [2021-11-25 19:15:34,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:15:34,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:34,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:34,033 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:34,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-11-25 19:15:34,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:15:34,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 19:15:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:34,428 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-11-25 19:15:34,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2021-11-25 19:15:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:35,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:37,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731025355] [2021-11-25 19:15:37,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731025355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2143748155] [2021-11-25 19:15:37,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:15:37,760 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:37,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:15:37,761 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:15:37,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2021-11-25 19:15:38,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:15:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:38,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 19:15:38,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:38,333 INFO L354 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2021-11-25 19:15:38,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 28 [2021-11-25 19:15:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:39,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:42,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2143748155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:42,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905816625] [2021-11-25 19:15:42,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:15:42,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:42,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:42,326 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:42,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-25 19:15:42,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:15:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:42,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:15:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:42,616 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-11-25 19:15:42,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2021-11-25 19:15:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:43,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:46,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905816625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:46,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:15:46,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12, 11, 11, 11] total 39 [2021-11-25 19:15:46,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437143689] [2021-11-25 19:15:46,339 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:15:46,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-25 19:15:46,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:15:46,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-25 19:15:46,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 19:15:46,340 INFO L87 Difference]: Start difference. First operand 1930 states and 2376 transitions. Second operand has 40 states, 39 states have (on average 5.512820512820513) internal successors, (215), 40 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:47,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:47,551 INFO L93 Difference]: Finished difference Result 2311 states and 2820 transitions. [2021-11-25 19:15:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 19:15:47,552 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 5.512820512820513) internal successors, (215), 40 states have internal predecessors, (215), 0 states have call successors, (0), 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 56 [2021-11-25 19:15:47,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:47,559 INFO L225 Difference]: With dead ends: 2311 [2021-11-25 19:15:47,560 INFO L226 Difference]: Without dead ends: 2214 [2021-11-25 19:15:47,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 290 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=350, Invalid=1542, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 19:15:47,560 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 461 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:47,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1005 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 203 Invalid, 0 Unknown, 135 Unchecked, 0.6s Time] [2021-11-25 19:15:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-11-25 19:15:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1830. [2021-11-25 19:15:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1825 states have (on average 1.244931506849315) internal successors, (2272), 1829 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2272 transitions. [2021-11-25 19:15:47,589 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2272 transitions. Word has length 56 [2021-11-25 19:15:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:47,590 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 2272 transitions. [2021-11-25 19:15:47,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 5.512820512820513) internal successors, (215), 40 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:15:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2272 transitions. [2021-11-25 19:15:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:15:47,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:47,592 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:47,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:47,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (97)] Ended with exit code 0 [2021-11-25 19:15:48,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-25 19:15:48,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:48,204 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:15:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash -564407577, now seen corresponding path program 5 times [2021-11-25 19:15:48,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:48,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188268107] [2021-11-25 19:15:48,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 19:15:48,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:48,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:48,205 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:48,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-11-25 19:15:48,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-25 19:15:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:48,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:15:48,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:49,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:50,459 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 27 treesize of output 23 [2021-11-25 19:15:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:15:51,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:51,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188268107] [2021-11-25 19:15:51,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188268107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:51,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688535945] [2021-11-25 19:15:51,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 19:15:51,518 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:51,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:15:51,519 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:15:51,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2021-11-25 19:16:43,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-25 19:16:43,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:43,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:16:43,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:16:43,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:44,574 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 27 treesize of output 23 [2021-11-25 19:16:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:16:44,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [688535945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705186257] [2021-11-25 19:16:44,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 19:16:44,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:44,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:44,809 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:16:44,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-25 19:16:50,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-25 19:16:50,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:50,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:16:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:16:50,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:51,388 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 27 treesize of output 23 [2021-11-25 19:16:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:16:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705186257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:51,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:16:51,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 19 [2021-11-25 19:16:51,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484687612] [2021-11-25 19:16:51,583 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:16:51,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:16:51,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:16:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:16:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:16:51,584 INFO L87 Difference]: Start difference. First operand 1830 states and 2272 transitions. Second operand has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:16:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:58,491 INFO L93 Difference]: Finished difference Result 12168 states and 15313 transitions. [2021-11-25 19:16:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 19:16:58,492 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 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 56 [2021-11-25 19:16:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:58,544 INFO L225 Difference]: With dead ends: 12168 [2021-11-25 19:16:58,544 INFO L226 Difference]: Without dead ends: 12168 [2021-11-25 19:16:58,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=509, Invalid=2247, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 19:16:58,546 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 2046 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2046 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:58,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2046 Valid, 1044 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 19:16:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12168 states. [2021-11-25 19:16:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12168 to 2335. [2021-11-25 19:16:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2330 states have (on average 1.2433476394849785) internal successors, (2897), 2334 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:16:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 2897 transitions. [2021-11-25 19:16:58,667 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 2897 transitions. Word has length 56 [2021-11-25 19:16:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:58,667 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 2897 transitions. [2021-11-25 19:16:58,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:16:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 2897 transitions. [2021-11-25 19:16:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 19:16:58,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:58,670 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:58,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:58,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (100)] Ended with exit code 0 [2021-11-25 19:16:59,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2021-11-25 19:16:59,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:16:59,299 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:16:59,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:59,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1544267116, now seen corresponding path program 5 times [2021-11-25 19:16:59,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:16:59,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246294212] [2021-11-25 19:16:59,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 19:16:59,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:16:59,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:16:59,301 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:16:59,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-11-25 19:16:59,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-25 19:16:59,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:59,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:16:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:17:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:17:00,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:17:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 35 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:17:03,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:17:03,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246294212] [2021-11-25 19:17:03,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246294212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:17:03,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [958512619] [2021-11-25 19:17:03,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 19:17:03,336 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:17:03,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:17:03,336 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:17:03,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2021-11-25 19:19:17,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-25 19:19:17,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:19:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:19:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:19:18,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:19:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 11 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:19:19,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [958512619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:19:19,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882996047] [2021-11-25 19:19:19,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 19:19:19,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:19:19,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:19:19,645 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:19:19,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-25 19:19:35,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-25 19:19:35,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:19:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:19:35,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:19:37,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:19:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:19:38,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882996047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:19:38,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:19:38,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 18, 18, 20, 17] total 77 [2021-11-25 19:19:38,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821010475] [2021-11-25 19:19:38,466 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:19:38,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-25 19:19:38,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:19:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-25 19:19:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=5180, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 19:19:38,468 INFO L87 Difference]: Start difference. First operand 2335 states and 2897 transitions. Second operand has 77 states, 77 states have (on average 3.0779220779220777) internal successors, (237), 77 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:19:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:19:43,458 INFO L93 Difference]: Finished difference Result 4380 states and 5158 transitions. [2021-11-25 19:19:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-25 19:19:43,459 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.0779220779220777) internal successors, (237), 77 states have internal predecessors, (237), 0 states have call successors, (0), 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 57 [2021-11-25 19:19:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:19:43,466 INFO L225 Difference]: With dead ends: 4380 [2021-11-25 19:19:43,466 INFO L226 Difference]: Without dead ends: 4339 [2021-11-25 19:19:43,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 259 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4524 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2040, Invalid=11070, Unknown=0, NotChecked=0, Total=13110 [2021-11-25 19:19:43,469 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 2821 mSDsluCounter, 3789 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2821 SdHoareTripleChecker+Valid, 3985 SdHoareTripleChecker+Invalid, 2813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:19:43,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2821 Valid, 3985 Invalid, 2813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:19:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-11-25 19:19:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3003. [2021-11-25 19:19:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 2998 states have (on average 1.2638425617078053) internal successors, (3789), 3002 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:19:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 3789 transitions. [2021-11-25 19:19:43,538 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 3789 transitions. Word has length 57 [2021-11-25 19:19:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:19:43,538 INFO L470 AbstractCegarLoop]: Abstraction has 3003 states and 3789 transitions. [2021-11-25 19:19:43,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.0779220779220777) internal successors, (237), 77 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:19:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 3789 transitions. [2021-11-25 19:19:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 19:19:43,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:19:43,541 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:19:43,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2021-11-25 19:19:43,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (103)] Ended with exit code 0 [2021-11-25 19:19:43,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-11-25 19:19:44,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:19:44,155 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:19:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:19:44,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1716480926, now seen corresponding path program 1 times [2021-11-25 19:19:44,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:19:44,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558373002] [2021-11-25 19:19:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:19:44,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:19:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:19:44,156 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:19:44,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-11-25 19:19:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:19:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:19:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:19:44,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:19:46,018 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 38 treesize of output 32 [2021-11-25 19:19:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:19:47,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:19:47,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558373002] [2021-11-25 19:19:47,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558373002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:19:47,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483750296] [2021-11-25 19:19:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:19:47,299 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:19:47,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:19:47,300 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:19:47,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2021-11-25 19:19:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:19:47,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:19:47,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:19:48,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:19:48,430 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 38 treesize of output 32 [2021-11-25 19:19:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:19:49,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [483750296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:19:49,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336192807] [2021-11-25 19:19:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:19:49,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:19:49,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:19:49,173 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:19:49,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-25 19:19:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:19:49,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:19:49,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:19:49,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:19:50,127 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 38 treesize of output 32 [2021-11-25 19:19:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:19:50,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336192807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:19:50,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:19:50,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 21 [2021-11-25 19:19:50,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517080265] [2021-11-25 19:19:50,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:19:50,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:19:50,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:19:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:19:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:19:50,859 INFO L87 Difference]: Start difference. First operand 3003 states and 3789 transitions. Second operand has 22 states, 21 states have (on average 4.095238095238095) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:19:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:19:52,965 INFO L93 Difference]: Finished difference Result 6106 states and 7115 transitions. [2021-11-25 19:19:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:19:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.095238095238095) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 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 57 [2021-11-25 19:19:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:19:52,974 INFO L225 Difference]: With dead ends: 6106 [2021-11-25 19:19:52,975 INFO L226 Difference]: Without dead ends: 5988 [2021-11-25 19:19:52,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:19:52,976 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 464 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:19:52,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 402 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 19:19:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5988 states. [2021-11-25 19:19:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5988 to 2744. [2021-11-25 19:19:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2739 states have (on average 1.2581234027017159) internal successors, (3446), 2743 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:19:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 3446 transitions. [2021-11-25 19:19:53,045 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 3446 transitions. Word has length 57 [2021-11-25 19:19:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:19:53,046 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 3446 transitions. [2021-11-25 19:19:53,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.095238095238095) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:19:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 3446 transitions. [2021-11-25 19:19:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 19:19:53,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:19:53,049 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:19:53,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-11-25 19:19:53,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 0 [2021-11-25 19:19:53,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2021-11-25 19:19:53,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:19:53,662 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:19:53,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:19:53,663 INFO L85 PathProgramCache]: Analyzing trace with hash -987577769, now seen corresponding path program 6 times [2021-11-25 19:19:53,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:19:53,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294956560] [2021-11-25 19:19:53,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 19:19:53,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:19:53,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:19:53,665 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:19:53,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-11-25 19:19:54,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-25 19:19:54,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:19:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 19:19:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:19:54,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:19:54,120 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 19:19:54,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-11-25 19:19:54,127 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 114 treesize of output 110 [2021-11-25 19:19:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-25 19:19:55,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:19:58,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:19:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-25 19:19:58,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:19:58,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294956560] [2021-11-25 19:19:58,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294956560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:19:58,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1100803644] [2021-11-25 19:19:58,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 19:19:58,608 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:19:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:19:58,618 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:19:58,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2021-11-25 19:19:59,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-25 19:19:59,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:19:59,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:19:59,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:59,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:19:59,770 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:19:59,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:19:59,791 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 56 treesize of output 54 [2021-11-25 19:20:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-25 19:20:00,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:20:09,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:20:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-25 19:20:09,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1100803644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:20:09,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205496487] [2021-11-25 19:20:09,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 19:20:09,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:20:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:20:09,626 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:20:09,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-25 19:20:11,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-25 19:20:11,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:20:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 19:20:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:20:11,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:20:11,436 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:20:11,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:20:11,445 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 48 treesize of output 46 [2021-11-25 19:20:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:20:14,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:20:24,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:20:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:20:24,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205496487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:20:24,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:20:24,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14, 14, 17, 18] total 65 [2021-11-25 19:20:24,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86367929] [2021-11-25 19:20:24,138 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:20:24,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-25 19:20:24,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:20:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-25 19:20:24,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=3735, Unknown=0, NotChecked=0, Total=4290 [2021-11-25 19:20:24,141 INFO L87 Difference]: Start difference. First operand 2744 states and 3446 transitions. Second operand has 66 states, 65 states have (on average 3.523076923076923) internal successors, (229), 66 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:21:13,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:15,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:22,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:37,386 INFO L93 Difference]: Finished difference Result 8056 states and 9568 transitions. [2021-11-25 19:21:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-25 19:21:37,387 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 3.523076923076923) internal successors, (229), 66 states have internal predecessors, (229), 0 states have call successors, (0), 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 61 [2021-11-25 19:21:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:37,401 INFO L225 Difference]: With dead ends: 8056 [2021-11-25 19:21:37,401 INFO L226 Difference]: Without dead ends: 7820 [2021-11-25 19:21:37,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 339 SyntacticMatches, 59 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 13683 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=4646, Invalid=24084, Unknown=0, NotChecked=0, Total=28730 [2021-11-25 19:21:37,405 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 3681 mSDsluCounter, 4109 mSDsCounter, 0 mSdLazyCounter, 5443 mSolverCounterSat, 423 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3681 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 7461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 5443 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 1592 IncrementalHoareTripleChecker+Unchecked, 26.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:37,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3681 Valid, 4321 Invalid, 7461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 5443 Invalid, 3 Unknown, 1592 Unchecked, 26.3s Time] [2021-11-25 19:21:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7820 states. [2021-11-25 19:21:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7820 to 4774. [2021-11-25 19:21:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4774 states, 4769 states have (on average 1.2692388341371357) internal successors, (6053), 4773 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:21:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4774 states to 4774 states and 6053 transitions. [2021-11-25 19:21:37,501 INFO L78 Accepts]: Start accepts. Automaton has 4774 states and 6053 transitions. Word has length 61 [2021-11-25 19:21:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:37,501 INFO L470 AbstractCegarLoop]: Abstraction has 4774 states and 6053 transitions. [2021-11-25 19:21:37,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 3.523076923076923) internal successors, (229), 66 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:21:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4774 states and 6053 transitions. [2021-11-25 19:21:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 19:21:37,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:37,505 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:37,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (109)] Forceful destruction successful, exit code 0 [2021-11-25 19:21:37,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-11-25 19:21:37,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2021-11-25 19:21:38,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:21:38,110 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:21:38,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:38,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1288171396, now seen corresponding path program 6 times [2021-11-25 19:21:38,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:21:38,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975736051] [2021-11-25 19:21:38,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 19:21:38,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:21:38,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:21:38,113 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:21:38,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-11-25 19:21:38,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-25 19:21:38,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:21:38,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 19:21:38,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:21:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:21:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:21:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:21:38,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-25 19:21:38,531 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:21:38,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 75 [2021-11-25 19:21:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 19:21:39,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:21:43,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:21:43,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:21:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 19:21:43,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:21:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975736051] [2021-11-25 19:21:43,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975736051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:21:43,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [620238053] [2021-11-25 19:21:43,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 19:21:43,240 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:21:43,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:21:43,241 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:21:43,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (112)] Waiting until timeout for monitored process [2021-11-25 19:21:43,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-25 19:21:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:21:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 19:21:43,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:21:43,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:21:44,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:21:44,022 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 19:21:44,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 24 [2021-11-25 19:21:44,043 INFO L354 Elim1Store]: treesize reduction 2, result has 75.0 percent of original size [2021-11-25 19:21:44,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 79 [2021-11-25 19:21:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 19:21:46,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:21:51,025 INFO L354 Elim1Store]: treesize reduction 1, result has 87.5 percent of original size [2021-11-25 19:21:51,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 150 [2021-11-25 19:21:51,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:21:51,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:21:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 19:21:51,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [620238053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:21:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968686524] [2021-11-25 19:21:51,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 19:21:51,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:21:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:21:51,057 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:21:51,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-25 19:21:51,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-25 19:21:51,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:21:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:21:51,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:21:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:21:51,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:21:51,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:21:51,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-25 19:21:51,483 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:21:51,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 75 [2021-11-25 19:21:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 19:21:52,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:21:54,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:21:54,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:21:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 19:21:54,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968686524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:21:54,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:21:54,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 38 [2021-11-25 19:21:54,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230855131] [2021-11-25 19:21:54,714 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:21:54,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-25 19:21:54,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:21:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-25 19:21:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:21:54,716 INFO L87 Difference]: Start difference. First operand 4774 states and 6053 transitions. Second operand has 39 states, 38 states have (on average 6.105263157894737) internal successors, (232), 39 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:00,487 INFO L93 Difference]: Finished difference Result 6717 states and 8514 transitions. [2021-11-25 19:22:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 19:22:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 6.105263157894737) internal successors, (232), 39 states have internal predecessors, (232), 0 states have call successors, (0), 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 64 [2021-11-25 19:22:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:00,495 INFO L225 Difference]: With dead ends: 6717 [2021-11-25 19:22:00,496 INFO L226 Difference]: Without dead ends: 6717 [2021-11-25 19:22:00,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 356 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=657, Invalid=2423, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 19:22:00,497 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 188 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:00,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 691 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2021-11-25 19:22:00,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2021-11-25 19:22:00,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 6039. [2021-11-25 19:22:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6039 states, 6034 states have (on average 1.2882001988730527) internal successors, (7773), 6038 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6039 states to 6039 states and 7773 transitions. [2021-11-25 19:22:00,647 INFO L78 Accepts]: Start accepts. Automaton has 6039 states and 7773 transitions. Word has length 64 [2021-11-25 19:22:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:00,648 INFO L470 AbstractCegarLoop]: Abstraction has 6039 states and 7773 transitions. [2021-11-25 19:22:00,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 6.105263157894737) internal successors, (232), 39 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 6039 states and 7773 transitions. [2021-11-25 19:22:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:22:00,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:00,651 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:22:00,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:00,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:01,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (112)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:01,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:22:01,278 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:22:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:01,279 INFO L85 PathProgramCache]: Analyzing trace with hash -308050855, now seen corresponding path program 2 times [2021-11-25 19:22:01,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:22:01,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404036998] [2021-11-25 19:22:01,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:22:01,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:22:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:22:01,280 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:22:01,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-11-25 19:22:01,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:22:01,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:22:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:22:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:22:02,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:03,421 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 27 treesize of output 23 [2021-11-25 19:22:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:22:04,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:22:04,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404036998] [2021-11-25 19:22:04,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404036998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:04,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1474930384] [2021-11-25 19:22:04,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:22:04,554 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:22:04,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:22:04,555 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:22:04,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2021-11-25 19:22:04,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:22:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:22:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:22:05,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:22:05,124 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:22:05,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:22:05,133 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 48 treesize of output 46 [2021-11-25 19:22:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:22:06,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:09,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:22:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:22:09,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1474930384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:09,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698469285] [2021-11-25 19:22:09,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:22:09,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:09,921 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:22:09,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-25 19:22:10,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:22:10,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:22:10,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:22:10,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:10,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:22:10,223 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-11-25 19:22:10,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2021-11-25 19:22:10,233 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 106 treesize of output 102 [2021-11-25 19:22:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:22:11,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:14,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:22:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:22:14,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698469285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:14,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:22:14,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15, 14, 13, 13] total 56 [2021-11-25 19:22:14,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6254985] [2021-11-25 19:22:14,320 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:22:14,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-25 19:22:14,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:22:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-25 19:22:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 19:22:14,322 INFO L87 Difference]: Start difference. First operand 6039 states and 7773 transitions. Second operand has 57 states, 56 states have (on average 4.142857142857143) internal successors, (232), 57 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:20,594 INFO L93 Difference]: Finished difference Result 6972 states and 8785 transitions. [2021-11-25 19:22:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-25 19:22:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 4.142857142857143) internal successors, (232), 57 states have internal predecessors, (232), 0 states have call successors, (0), 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 65 [2021-11-25 19:22:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:20,601 INFO L225 Difference]: With dead ends: 6972 [2021-11-25 19:22:20,601 INFO L226 Difference]: Without dead ends: 6932 [2021-11-25 19:22:20,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=756, Invalid=4500, Unknown=0, NotChecked=0, Total=5256 [2021-11-25 19:22:20,603 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 934 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:20,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 997 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 892 Invalid, 0 Unknown, 255 Unchecked, 3.0s Time] [2021-11-25 19:22:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2021-11-25 19:22:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6145. [2021-11-25 19:22:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6145 states, 6140 states have (on average 1.2840390879478827) internal successors, (7884), 6144 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6145 states to 6145 states and 7884 transitions. [2021-11-25 19:22:20,693 INFO L78 Accepts]: Start accepts. Automaton has 6145 states and 7884 transitions. Word has length 65 [2021-11-25 19:22:20,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:20,693 INFO L470 AbstractCegarLoop]: Abstraction has 6145 states and 7884 transitions. [2021-11-25 19:22:20,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 4.142857142857143) internal successors, (232), 57 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6145 states and 7884 transitions. [2021-11-25 19:22:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 19:22:20,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:20,728 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:22:20,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:20,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (115)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:21,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-11-25 19:22:21,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:21,329 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:22:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:21,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1942992570, now seen corresponding path program 1 times [2021-11-25 19:22:21,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:22:21,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354375750] [2021-11-25 19:22:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:21,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:22:21,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:22:21,331 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:22:21,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-11-25 19:22:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:21,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:22:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:22:22,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:22:23,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:22:23,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354375750] [2021-11-25 19:22:23,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354375750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:23,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [81898690] [2021-11-25 19:22:23,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:23,016 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:22:23,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:22:23,024 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:22:23,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2021-11-25 19:22:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:23,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:22:23,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:22:24,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:22:24,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [81898690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:24,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119452118] [2021-11-25 19:22:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:24,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:24,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:24,984 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:22:24,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-25 19:22:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:25,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:22:25,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:22:25,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:22:26,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119452118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:26,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:22:26,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15, 14, 15, 14] total 37 [2021-11-25 19:22:26,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755665963] [2021-11-25 19:22:26,078 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:22:26,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 19:22:26,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:22:26,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 19:22:26,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:22:26,079 INFO L87 Difference]: Start difference. First operand 6145 states and 7884 transitions. Second operand has 37 states, 37 states have (on average 5.1891891891891895) internal successors, (192), 37 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:28,176 INFO L93 Difference]: Finished difference Result 10111 states and 12807 transitions. [2021-11-25 19:22:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 19:22:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.1891891891891895) internal successors, (192), 37 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-25 19:22:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:28,184 INFO L225 Difference]: With dead ends: 10111 [2021-11-25 19:22:28,184 INFO L226 Difference]: Without dead ends: 8838 [2021-11-25 19:22:28,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 19:22:28,185 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 697 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:28,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 1967 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:22:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8838 states. [2021-11-25 19:22:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8838 to 7396. [2021-11-25 19:22:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7396 states, 7391 states have (on average 1.2785820592612638) internal successors, (9450), 7395 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7396 states to 7396 states and 9450 transitions. [2021-11-25 19:22:28,319 INFO L78 Accepts]: Start accepts. Automaton has 7396 states and 9450 transitions. Word has length 67 [2021-11-25 19:22:28,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:28,320 INFO L470 AbstractCegarLoop]: Abstraction has 7396 states and 9450 transitions. [2021-11-25 19:22:28,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.1891891891891895) internal successors, (192), 37 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 7396 states and 9450 transitions. [2021-11-25 19:22:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 19:22:28,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:28,325 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-25 19:22:28,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:28,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (118)] Ended with exit code 0 [2021-11-25 19:22:28,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-11-25 19:22:28,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:28,940 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-25 19:22:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:28,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1770568872, now seen corresponding path program 4 times [2021-11-25 19:22:28,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:22:28,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592037006] [2021-11-25 19:22:28,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:22:28,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:22:28,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:22:28,942 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:22:28,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2021-11-25 19:22:29,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:22:29,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:22:29,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 19:22:29,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:29,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:22:29,354 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-11-25 19:22:29,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 24 [2021-11-25 19:22:29,361 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 20 treesize of output 18 [2021-11-25 19:22:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:31,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:42,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:22:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:43,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:22:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592037006] [2021-11-25 19:22:43,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592037006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [538124653] [2021-11-25 19:22:43,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:22:43,077 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:22:43,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:22:43,078 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:22:43,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2021-11-25 19:22:44,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:22:44,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:22:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 19:22:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:44,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:22:44,752 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-11-25 19:22:44,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 24 [2021-11-25 19:22:44,763 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 20 treesize of output 18 [2021-11-25 19:22:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:46,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:50,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:22:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:50,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [538124653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:50,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837881050] [2021-11-25 19:22:50,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:22:50,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:50,616 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:22:50,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b8630d-7dd8-4803-b245-516fc9b1d823/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-25 19:22:50,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:22:50,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:22:50,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:22:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:50,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:22:50,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:22:50,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:22:50,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-25 19:22:50,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:22:50,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 139 [2021-11-25 19:22:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:52,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:23:02,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:02,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:23:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837881050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:23:03,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:23:03,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 19, 19] total 77 [2021-11-25 19:23:03,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99495300] [2021-11-25 19:23:03,285 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:23:03,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-25 19:23:03,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:23:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-25 19:23:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1564, Invalid=4442, Unknown=0, NotChecked=0, Total=6006 [2021-11-25 19:23:03,288 INFO L87 Difference]: Start difference. First operand 7396 states and 9450 transitions. Second operand has 78 states, 77 states have (on average 3.3506493506493507) internal successors, (258), 78 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:15,242 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:23:17,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:23:19,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:23:21,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:23:28,385 WARN L227 SmtUtils]: Spent 6.46s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:23:34,210 WARN L227 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:23:36,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:23:38,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:23:40,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:23:47,959 WARN L227 SmtUtils]: Spent 6.79s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:23:56,141 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:23:58,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:00,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:10,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:12,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:14,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:24,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:26,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:28,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:37,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:39,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:41,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:49,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:51,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:54,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:01,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:03,262 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:09,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:11,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:17,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:19,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:24,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:26,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:31,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:34,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []