./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF --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 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:51:31,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:51:31,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:51:31,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:51:31,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:51:31,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:51:31,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:51:31,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:51:31,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:51:31,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:51:31,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:51:31,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:51:31,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:51:31,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:51:31,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:51:31,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:51:31,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:51:31,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:51:31,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:51:31,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:51:31,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:51:31,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:51:31,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:51:31,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:51:31,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:51:31,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:51:31,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:51:31,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:51:31,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:51:31,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:51:31,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:51:31,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:51:31,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:51:31,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:51:31,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:51:31,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:51:31,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:51:31,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:51:31,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:51:31,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:51:31,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:51:31,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-12 22:51:31,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:51:31,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:51:31,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:51:31,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:51:31,584 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:51:31,584 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:51:31,584 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:51:31,585 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:51:31,585 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:51:31,585 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:51:31,586 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:51:31,587 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:51:31,587 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:51:31,587 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:51:31,588 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:51:31,588 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:51:31,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 22:51:31,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 22:51:31,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:51:31,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:51:31,590 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 22:51:31,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:51:31,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:51:31,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:51:31,591 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 22:51:31,591 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 22:51:31,592 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 22:51:31,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:51:31,592 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:51:31,592 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:51:31,593 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:51:31,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:51:31,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:51:31,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:51:31,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:51:31,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:51:31,595 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:51:31,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:51:31,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:51:31,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:51:31,596 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_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 [2021-11-12 22:51:31,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:51:32,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:51:32,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:51:32,047 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:51:32,048 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:51:32,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-11-12 22:51:32,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data/9948ade4a/6729c0c38eb742f5a6ff66729365ebe2/FLAG90dcc6d41 [2021-11-12 22:51:32,955 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:51:32,956 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-11-12 22:51:32,985 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data/9948ade4a/6729c0c38eb742f5a6ff66729365ebe2/FLAG90dcc6d41 [2021-11-12 22:51:33,105 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data/9948ade4a/6729c0c38eb742f5a6ff66729365ebe2 [2021-11-12 22:51:33,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:51:33,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:51:33,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:33,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:51:33,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:51:33,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:33" (1/1) ... [2021-11-12 22:51:33,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c11652c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:33, skipping insertion in model container [2021-11-12 22:51:33,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:33" (1/1) ... [2021-11-12 22:51:33,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:51:33,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:51:33,724 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i[33022,33035] [2021-11-12 22:51:34,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:34,049 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:51:34,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d73ab3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:34, skipping insertion in model container [2021-11-12 22:51:34,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:34,051 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:51:34,054 INFO L158 Benchmark]: Toolchain (without parser) took 942.98ms. Allocated memory is still 121.6MB. Free memory was 81.8MB in the beginning and 77.2MB in the end (delta: 4.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:51:34,056 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 121.6MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:51:34,058 INFO L158 Benchmark]: CACSL2BoogieTranslator took 936.10ms. Allocated memory is still 121.6MB. Free memory was 81.6MB in the beginning and 77.2MB in the end (delta: 4.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:51:34,061 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 121.6MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 936.10ms. Allocated memory is still 121.6MB. Free memory was 81.6MB in the beginning and 77.2MB in the end (delta: 4.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF --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 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:51:36,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:51:36,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:51:36,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:51:36,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:51:36,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:51:36,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:51:36,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:51:36,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:51:36,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:51:36,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:51:36,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:51:36,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:51:36,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:51:36,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:51:36,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:51:36,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:51:36,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:51:36,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:51:36,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:51:36,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:51:36,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:51:36,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:51:36,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:51:36,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:51:36,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:51:36,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:51:36,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:51:36,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:51:36,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:51:36,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:51:36,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:51:36,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:51:36,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:51:36,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:51:36,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:51:36,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:51:36,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:51:36,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:51:36,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:51:36,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:51:36,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-12 22:51:36,388 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:51:36,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:51:36,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:51:36,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:51:36,390 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:51:36,390 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:51:36,391 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:51:36,391 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:51:36,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:51:36,391 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:51:36,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 22:51:36,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 22:51:36,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:51:36,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:51:36,393 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 22:51:36,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:51:36,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:51:36,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:51:36,394 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 22:51:36,394 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 22:51:36,394 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 22:51:36,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:51:36,395 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:51:36,395 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:51:36,395 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:51:36,396 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:51:36,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:51:36,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:51:36,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:51:36,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:51:36,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:51:36,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:51:36,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:51:36,398 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:51:36,398 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:51:36,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:51:36,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:51:36,398 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_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 [2021-11-12 22:51:36,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:51:36,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:51:36,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:51:36,922 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:51:36,922 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:51:36,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-11-12 22:51:37,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data/d185417c4/1af43714d97448998f5cd0f8c9806b3d/FLAG707415ecf [2021-11-12 22:51:37,869 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:51:37,871 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-11-12 22:51:37,900 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data/d185417c4/1af43714d97448998f5cd0f8c9806b3d/FLAG707415ecf [2021-11-12 22:51:37,999 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/data/d185417c4/1af43714d97448998f5cd0f8c9806b3d [2021-11-12 22:51:38,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:51:38,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:51:38,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:38,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:51:38,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:51:38,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:38" (1/1) ... [2021-11-12 22:51:38,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff571a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:38, skipping insertion in model container [2021-11-12 22:51:38,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:38" (1/1) ... [2021-11-12 22:51:38,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:51:38,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:51:38,765 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i[33022,33035] [2021-11-12 22:51:39,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:39,132 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:51:39,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:51:39,191 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i[33022,33035] [2021-11-12 22:51:39,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:39,340 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:51:39,374 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i[33022,33035] [2021-11-12 22:51:39,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:39,645 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:51:39,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39 WrapperNode [2021-11-12 22:51:39,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:39,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:51:39,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:51:39,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:51:39,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:39,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:39,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:51:39,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:51:39,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:51:39,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:51:39,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:39,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:39,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:39,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:40,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:40,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:40,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:40,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:51:40,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:51:40,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:51:40,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:51:40,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (1/1) ... [2021-11-12 22:51:40,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:51:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:51:40,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:51:40,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:51:40,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:51:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-12 22:51:40,217 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-12 22:51:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:51:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:51:40,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:51:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:51:40,217 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:51:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:51:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:51:40,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:51:40,218 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 22:51:40,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:51:40,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:51:40,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:51:40,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:51:40,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:51:40,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:51:40,579 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 22:51:51,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:51:51,123 INFO L299 CfgBuilder]: Removed 160 assume(true) statements. [2021-11-12 22:51:51,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:51:51 BoogieIcfgContainer [2021-11-12 22:51:51,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:51:51,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:51:51,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:51:51,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:51:51,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:51:38" (1/3) ... [2021-11-12 22:51:51,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b6e976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:51:51, skipping insertion in model container [2021-11-12 22:51:51,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:39" (2/3) ... [2021-11-12 22:51:51,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b6e976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:51:51, skipping insertion in model container [2021-11-12 22:51:51,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:51:51" (3/3) ... [2021-11-12 22:51:51,139 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-2.i [2021-11-12 22:51:51,145 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:51:51,145 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1095 error locations. [2021-11-12 22:51:51,211 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:51:51,225 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 [2021-11-12 22:51:51,225 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1095 error locations. [2021-11-12 22:51:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 2259 states, 1152 states have (on average 2.2144097222222223) internal successors, (2551), 2245 states have internal predecessors, (2551), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-12 22:51:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-12 22:51:51,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:51,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-12 22:51:51,298 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:51:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:51,304 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-11-12 22:51:51,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:51,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570441522] [2021-11-12 22:51:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:51,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:51,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:51,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:51,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:51:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:51,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:51:51,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:51,742 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:51:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:51,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:51,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:51,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570441522] [2021-11-12 22:51:51,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570441522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:51,795 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:51,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:51:51,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136108642] [2021-11-12 22:51:51,799 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:51,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:51:51,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:51:51,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:51:51,857 INFO L87 Difference]: Start difference. First operand has 2259 states, 1152 states have (on average 2.2144097222222223) internal successors, (2551), 2245 states have internal predecessors, (2551), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:57,503 INFO L93 Difference]: Finished difference Result 2934 states and 3120 transitions. [2021-11-12 22:51:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:51:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-12 22:51:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:57,553 INFO L225 Difference]: With dead ends: 2934 [2021-11-12 22:51:57,554 INFO L226 Difference]: Without dead ends: 2932 [2021-11-12 22:51:57,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:51:57,564 INFO L933 BasicCegarLoop]: 1394 mSDtfsCounter, 2142 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4534.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.14ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5420.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:57,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 1869 Invalid, 1495 Unknown, 0 Unchecked, 40.14ms Time], IncrementalHoareTripleChecker [23 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 5420.07ms Time] [2021-11-12 22:51:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-11-12 22:51:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2401. [2021-11-12 22:51:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 1318 states have (on average 2.0515933232169954) internal successors, (2704), 2385 states have internal predecessors, (2704), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:51:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 2736 transitions. [2021-11-12 22:51:57,732 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 2736 transitions. Word has length 3 [2021-11-12 22:51:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:57,733 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 2736 transitions. [2021-11-12 22:51:57,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 2736 transitions. [2021-11-12 22:51:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-12 22:51:57,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:57,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-12 22:51:57,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:57,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:57,954 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:51:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:57,955 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-11-12 22:51:57,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:57,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787514150] [2021-11-12 22:51:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:57,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:57,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:57,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:57,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:51:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:51:58,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:58,196 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:51:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:58,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:58,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:58,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787514150] [2021-11-12 22:51:58,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787514150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:58,281 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:58,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-12 22:51:58,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414094623] [2021-11-12 22:51:58,282 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:58,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:51:58,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:51:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:51:58,284 INFO L87 Difference]: Start difference. First operand 2401 states and 2736 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:09,462 INFO L93 Difference]: Finished difference Result 3701 states and 4147 transitions. [2021-11-12 22:52:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 3 [2021-11-12 22:52:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:09,496 INFO L225 Difference]: With dead ends: 3701 [2021-11-12 22:52:09,497 INFO L226 Difference]: Without dead ends: 3701 [2021-11-12 22:52:09,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:09,500 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 2670 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9654.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2678 SdHoareTripleChecker+Valid, 3520 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.76ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11016.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:09,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2678 Valid, 3520 Invalid, 2336 Unknown, 0 Unchecked, 25.76ms Time], IncrementalHoareTripleChecker [23 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 11016.63ms Time] [2021-11-12 22:52:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2021-11-12 22:52:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 2565. [2021-11-12 22:52:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 1494 states have (on average 2.038821954484605) internal successors, (3046), 2549 states have internal predecessors, (3046), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 3078 transitions. [2021-11-12 22:52:09,595 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 3078 transitions. Word has length 3 [2021-11-12 22:52:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:09,596 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 3078 transitions. [2021-11-12 22:52:09,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 3078 transitions. [2021-11-12 22:52:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:52:09,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:09,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:09,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:09,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:09,809 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:09,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-11-12 22:52:09,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:09,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784047122] [2021-11-12 22:52:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:09,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:09,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:09,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:09,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:52:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:10,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:10,071 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:52:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:10,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:10,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:10,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784047122] [2021-11-12 22:52:10,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784047122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:10,144 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:10,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:52:10,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394455685] [2021-11-12 22:52:10,144 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:10,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:52:10,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:52:10,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:52:10,147 INFO L87 Difference]: Start difference. First operand 2565 states and 3078 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:14,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:14,842 INFO L93 Difference]: Finished difference Result 3303 states and 3816 transitions. [2021-11-12 22:52:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:14,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-12 22:52:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:14,866 INFO L225 Difference]: With dead ends: 3303 [2021-11-12 22:52:14,866 INFO L226 Difference]: Without dead ends: 3303 [2021-11-12 22:52:14,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:52:14,873 INFO L933 BasicCegarLoop]: 2161 mSDtfsCounter, 1987 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3856.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.65ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4611.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:14,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 2909 Invalid, 1583 Unknown, 0 Unchecked, 15.65ms Time], IncrementalHoareTripleChecker [102 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 4611.98ms Time] [2021-11-12 22:52:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2021-11-12 22:52:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 2474. [2021-11-12 22:52:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 1494 states have (on average 1.9551539491298529) internal successors, (2921), 2458 states have internal predecessors, (2921), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 2953 transitions. [2021-11-12 22:52:14,959 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 2953 transitions. Word has length 8 [2021-11-12 22:52:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:14,960 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 2953 transitions. [2021-11-12 22:52:14,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 2953 transitions. [2021-11-12 22:52:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:52:14,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:14,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:14,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:15,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:15,182 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-11-12 22:52:15,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:15,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105322965] [2021-11-12 22:52:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:15,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:15,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:15,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:52:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:15,495 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:52:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:15,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:15,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:15,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105322965] [2021-11-12 22:52:15,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105322965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:15,631 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:15,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-12 22:52:15,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666839469] [2021-11-12 22:52:15,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:15,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:15,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:15,633 INFO L87 Difference]: Start difference. First operand 2474 states and 2953 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:26,371 INFO L93 Difference]: Finished difference Result 3429 states and 3844 transitions. [2021-11-12 22:52:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:26,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 8 [2021-11-12 22:52:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:26,387 INFO L225 Difference]: With dead ends: 3429 [2021-11-12 22:52:26,388 INFO L226 Difference]: Without dead ends: 3429 [2021-11-12 22:52:26,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:26,389 INFO L933 BasicCegarLoop]: 2491 mSDtfsCounter, 1441 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9401.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 4655 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.22ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10632.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:26,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 4655 Invalid, 2619 Unknown, 0 Unchecked, 25.22ms Time], IncrementalHoareTripleChecker [27 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 10632.57ms Time] [2021-11-12 22:52:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-11-12 22:52:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2466. [2021-11-12 22:52:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 1496 states have (on average 1.9391711229946524) internal successors, (2901), 2450 states have internal predecessors, (2901), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 2933 transitions. [2021-11-12 22:52:26,452 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 2933 transitions. Word has length 8 [2021-11-12 22:52:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:26,452 INFO L470 AbstractCegarLoop]: Abstraction has 2466 states and 2933 transitions. [2021-11-12 22:52:26,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 2933 transitions. [2021-11-12 22:52:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 22:52:26,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:26,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:26,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:26,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:26,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:26,664 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-11-12 22:52:26,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:26,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614705647] [2021-11-12 22:52:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:26,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:26,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:26,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:26,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:52:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:26,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:26,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:26,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614705647] [2021-11-12 22:52:26,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614705647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:26,939 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:26,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:52:26,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584998024] [2021-11-12 22:52:26,940 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:26,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:26,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:26,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:26,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:26,941 INFO L87 Difference]: Start difference. First operand 2466 states and 2933 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-12 22:52:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:26,993 INFO L93 Difference]: Finished difference Result 2424 states and 2890 transitions. [2021-11-12 22:52:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:26,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 11 [2021-11-12 22:52:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:27,007 INFO L225 Difference]: With dead ends: 2424 [2021-11-12 22:52:27,007 INFO L226 Difference]: Without dead ends: 2424 [2021-11-12 22:52:27,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:27,009 INFO L933 BasicCegarLoop]: 2210 mSDtfsCounter, 1006 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 4630 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.88ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:27,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 4630 Invalid, 14 Unknown, 0 Unchecked, 5.88ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 21.55ms Time] [2021-11-12 22:52:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-11-12 22:52:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2424. [2021-11-12 22:52:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 1478 states have (on average 1.9336941813261164) internal successors, (2858), 2408 states have internal predecessors, (2858), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 2890 transitions. [2021-11-12 22:52:27,068 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 2890 transitions. Word has length 11 [2021-11-12 22:52:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:27,068 INFO L470 AbstractCegarLoop]: Abstraction has 2424 states and 2890 transitions. [2021-11-12 22:52:27,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-12 22:52:27,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 2890 transitions. [2021-11-12 22:52:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 22:52:27,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:27,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:27,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:27,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:27,281 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-11-12 22:52:27,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:27,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318470559] [2021-11-12 22:52:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:27,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:27,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:27,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:27,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:52:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:27,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:27,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:27,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:27,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:27,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318470559] [2021-11-12 22:52:27,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318470559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:27,563 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:27,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:52:27,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330689258] [2021-11-12 22:52:27,563 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:27,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:27,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:27,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:27,565 INFO L87 Difference]: Start difference. First operand 2424 states and 2890 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-11-12 22:52:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:27,681 INFO L93 Difference]: Finished difference Result 2403 states and 2862 transitions. [2021-11-12 22:52:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 13 [2021-11-12 22:52:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:27,695 INFO L225 Difference]: With dead ends: 2403 [2021-11-12 22:52:27,695 INFO L226 Difference]: Without dead ends: 2403 [2021-11-12 22:52:27,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:27,696 INFO L933 BasicCegarLoop]: 2165 mSDtfsCounter, 977 mSDsluCounter, 4578 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 6743 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.47ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:27,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 6743 Invalid, 67 Unknown, 0 Unchecked, 13.47ms Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 63.20ms Time] [2021-11-12 22:52:27,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-11-12 22:52:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2402. [2021-11-12 22:52:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 1470 states have (on average 1.9244897959183673) internal successors, (2829), 2386 states have internal predecessors, (2829), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 2861 transitions. [2021-11-12 22:52:27,777 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 2861 transitions. Word has length 13 [2021-11-12 22:52:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:27,778 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 2861 transitions. [2021-11-12 22:52:27,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-11-12 22:52:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 2861 transitions. [2021-11-12 22:52:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 22:52:27,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:27,779 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] [2021-11-12 22:52:27,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:27,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:27,995 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:27,995 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-11-12 22:52:27,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:27,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544822464] [2021-11-12 22:52:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:27,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:27,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:27,996 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:27,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:52:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:28,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:28,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:28,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:28,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544822464] [2021-11-12 22:52:28,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544822464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:28,266 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:28,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:52:28,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151024496] [2021-11-12 22:52:28,266 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:28,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:28,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:28,267 INFO L87 Difference]: Start difference. First operand 2402 states and 2861 transitions. Second operand has 4 states, 4 states have (on average 5.5) 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) [2021-11-12 22:52:28,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:28,355 INFO L93 Difference]: Finished difference Result 3878 states and 4485 transitions. [2021-11-12 22:52:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:28,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) 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 20 [2021-11-12 22:52:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:28,376 INFO L225 Difference]: With dead ends: 3878 [2021-11-12 22:52:28,376 INFO L226 Difference]: Without dead ends: 3878 [2021-11-12 22:52:28,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:28,378 INFO L933 BasicCegarLoop]: 3487 mSDtfsCounter, 4182 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4192 SdHoareTripleChecker+Valid, 5105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.33ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:28,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4192 Valid, 5105 Invalid, 23 Unknown, 0 Unchecked, 9.33ms Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 43.70ms Time] [2021-11-12 22:52:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-11-12 22:52:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2360. [2021-11-12 22:52:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 1452 states have (on average 1.918732782369146) internal successors, (2786), 2344 states have internal predecessors, (2786), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 2818 transitions. [2021-11-12 22:52:28,447 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 2818 transitions. Word has length 20 [2021-11-12 22:52:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:28,447 INFO L470 AbstractCegarLoop]: Abstraction has 2360 states and 2818 transitions. [2021-11-12 22:52:28,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) 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) [2021-11-12 22:52:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 2818 transitions. [2021-11-12 22:52:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 22:52:28,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:28,449 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] [2021-11-12 22:52:28,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:28,664 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-11-12 22:52:28,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:28,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649985807] [2021-11-12 22:52:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:28,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:28,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:28,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:28,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:28,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:28,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:28,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:28,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649985807] [2021-11-12 22:52:28,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649985807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:28,920 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:28,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:52:28,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529247224] [2021-11-12 22:52:28,920 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:28,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:28,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:28,921 INFO L87 Difference]: Start difference. First operand 2360 states and 2818 transitions. Second operand has 4 states, 4 states have (on average 5.5) 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) [2021-11-12 22:52:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:28,969 INFO L93 Difference]: Finished difference Result 3751 states and 4304 transitions. [2021-11-12 22:52:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:28,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) 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 20 [2021-11-12 22:52:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:28,993 INFO L225 Difference]: With dead ends: 3751 [2021-11-12 22:52:28,993 INFO L226 Difference]: Without dead ends: 3751 [2021-11-12 22:52:28,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:28,994 INFO L933 BasicCegarLoop]: 3395 mSDtfsCounter, 2048 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 6531 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:28,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2058 Valid, 6531 Invalid, 14 Unknown, 0 Unchecked, 5.63ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 15.37ms Time] [2021-11-12 22:52:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2021-11-12 22:52:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 2282. [2021-11-12 22:52:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 1398 states have (on average 1.9005722460658083) internal successors, (2657), 2266 states have internal predecessors, (2657), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 2689 transitions. [2021-11-12 22:52:29,052 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 2689 transitions. Word has length 20 [2021-11-12 22:52:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:29,052 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 2689 transitions. [2021-11-12 22:52:29,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) 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) [2021-11-12 22:52:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 2689 transitions. [2021-11-12 22:52:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:52:29,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:29,054 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] [2021-11-12 22:52:29,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:29,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:29,268 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:29,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-11-12 22:52:29,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:29,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463595369] [2021-11-12 22:52:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:29,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:29,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:29,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:29,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:52:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:29,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:29,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:29,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:29,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463595369] [2021-11-12 22:52:29,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463595369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:29,581 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:29,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:52:29,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139539953] [2021-11-12 22:52:29,581 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:29,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:29,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:29,584 INFO L87 Difference]: Start difference. First operand 2282 states and 2689 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:29,742 INFO L93 Difference]: Finished difference Result 3737 states and 4285 transitions. [2021-11-12 22:52:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:52:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:29,760 INFO L225 Difference]: With dead ends: 3737 [2021-11-12 22:52:29,760 INFO L226 Difference]: Without dead ends: 3737 [2021-11-12 22:52:29,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:29,761 INFO L933 BasicCegarLoop]: 3356 mSDtfsCounter, 4028 mSDsluCounter, 4924 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4038 SdHoareTripleChecker+Valid, 8280 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.14ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:29,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4038 Valid, 8280 Invalid, 86 Unknown, 0 Unchecked, 11.14ms Time], IncrementalHoareTripleChecker [52 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 90.24ms Time] [2021-11-12 22:52:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-11-12 22:52:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 2260. [2021-11-12 22:52:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1390 states have (on average 1.8906474820143886) internal successors, (2628), 2244 states have internal predecessors, (2628), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2660 transitions. [2021-11-12 22:52:29,819 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2660 transitions. Word has length 22 [2021-11-12 22:52:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:29,819 INFO L470 AbstractCegarLoop]: Abstraction has 2260 states and 2660 transitions. [2021-11-12 22:52:29,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2660 transitions. [2021-11-12 22:52:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:52:29,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:29,820 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] [2021-11-12 22:52:29,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:30,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:30,032 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-11-12 22:52:30,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:30,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520298958] [2021-11-12 22:52:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:30,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:30,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:30,034 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:30,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:52:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:30,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:30,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:30,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:30,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:30,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520298958] [2021-11-12 22:52:30,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520298958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:30,363 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:30,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:52:30,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129970846] [2021-11-12 22:52:30,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:30,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:30,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:30,365 INFO L87 Difference]: Start difference. First operand 2260 states and 2660 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:30,508 INFO L93 Difference]: Finished difference Result 3672 states and 4162 transitions. [2021-11-12 22:52:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:52:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:30,534 INFO L225 Difference]: With dead ends: 3672 [2021-11-12 22:52:30,534 INFO L226 Difference]: Without dead ends: 3672 [2021-11-12 22:52:30,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:30,535 INFO L933 BasicCegarLoop]: 3502 mSDtfsCounter, 1984 mSDsluCounter, 6561 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 10063 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.84ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:30,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1994 Valid, 10063 Invalid, 67 Unknown, 0 Unchecked, 13.84ms Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 66.42ms Time] [2021-11-12 22:52:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-11-12 22:52:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 2222. [2021-11-12 22:52:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 1366 states have (on average 1.8601756954612005) internal successors, (2541), 2206 states have internal predecessors, (2541), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 2573 transitions. [2021-11-12 22:52:30,595 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 2573 transitions. Word has length 22 [2021-11-12 22:52:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:30,595 INFO L470 AbstractCegarLoop]: Abstraction has 2222 states and 2573 transitions. [2021-11-12 22:52:30,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 2573 transitions. [2021-11-12 22:52:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 22:52:30,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:30,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:30,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:30,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:30,809 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:30,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-11-12 22:52:30,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:30,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223351022] [2021-11-12 22:52:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:30,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:30,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:30,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:30,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:52:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:31,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:31,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:31,017 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:52:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:31,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:31,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:31,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223351022] [2021-11-12 22:52:31,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223351022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:31,228 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:31,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:52:31,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138675035] [2021-11-12 22:52:31,228 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:31,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:31,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:31,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:31,230 INFO L87 Difference]: Start difference. First operand 2222 states and 2573 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:34,925 INFO L93 Difference]: Finished difference Result 2674 states and 2936 transitions. [2021-11-12 22:52:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:34,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-12 22:52:34,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:34,933 INFO L225 Difference]: With dead ends: 2674 [2021-11-12 22:52:34,933 INFO L226 Difference]: Without dead ends: 2674 [2021-11-12 22:52:34,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:34,934 INFO L933 BasicCegarLoop]: 1243 mSDtfsCounter, 2729 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3046.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2735 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.20ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3632.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:34,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2735 Valid, 2340 Invalid, 1800 Unknown, 0 Unchecked, 11.20ms Time], IncrementalHoareTripleChecker [21 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 3632.95ms Time] [2021-11-12 22:52:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-11-12 22:52:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2218. [2021-11-12 22:52:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 1366 states have (on average 1.857247437774524) internal successors, (2537), 2202 states have internal predecessors, (2537), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 2569 transitions. [2021-11-12 22:52:34,981 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 2569 transitions. Word has length 27 [2021-11-12 22:52:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:34,981 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 2569 transitions. [2021-11-12 22:52:34,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 2569 transitions. [2021-11-12 22:52:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 22:52:34,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:34,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:35,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:35,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:35,194 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:35,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-11-12 22:52:35,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:35,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424360639] [2021-11-12 22:52:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:35,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:35,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:35,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:52:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:52:35,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:35,429 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:52:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:35,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:36,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:36,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424360639] [2021-11-12 22:52:36,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424360639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:36,203 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:36,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:52:36,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781135604] [2021-11-12 22:52:36,203 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:36,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:52:36,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:52:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:36,205 INFO L87 Difference]: Start difference. First operand 2218 states and 2569 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 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) [2021-11-12 22:52:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:51,073 INFO L93 Difference]: Finished difference Result 3215 states and 3552 transitions. [2021-11-12 22:52:51,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:52:51,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 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) Word has length 27 [2021-11-12 22:52:51,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:51,082 INFO L225 Difference]: With dead ends: 3215 [2021-11-12 22:52:51,082 INFO L226 Difference]: Without dead ends: 3215 [2021-11-12 22:52:51,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:52:51,083 INFO L933 BasicCegarLoop]: 1481 mSDtfsCounter, 4179 mSDsluCounter, 3074 mSDsCounter, 0 mSdLazyCounter, 3520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12857.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4179 SdHoareTripleChecker+Valid, 4555 SdHoareTripleChecker+Invalid, 3544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.57ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14667.87ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:51,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4179 Valid, 4555 Invalid, 3544 Unknown, 0 Unchecked, 27.57ms Time], IncrementalHoareTripleChecker [24 Valid, 3520 Invalid, 0 Unknown, 0 Unchecked, 14667.87ms Time] [2021-11-12 22:52:51,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-11-12 22:52:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2251. [2021-11-12 22:52:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 1400 states have (on average 1.8385714285714285) internal successors, (2574), 2235 states have internal predecessors, (2574), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 2606 transitions. [2021-11-12 22:52:51,136 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 2606 transitions. Word has length 27 [2021-11-12 22:52:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:51,137 INFO L470 AbstractCegarLoop]: Abstraction has 2251 states and 2606 transitions. [2021-11-12 22:52:51,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 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) [2021-11-12 22:52:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 2606 transitions. [2021-11-12 22:52:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 22:52:51,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:51,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:51,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:51,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:51,358 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-11-12 22:52:51,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:51,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355568672] [2021-11-12 22:52:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:51,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:51,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:51,361 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:51,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:52:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:51,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:51,659 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:52:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:51,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:51,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:51,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355568672] [2021-11-12 22:52:51,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355568672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:51,933 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:51,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:52:51,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935807848] [2021-11-12 22:52:51,934 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:51,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:51,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:51,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:51,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:51,935 INFO L87 Difference]: Start difference. First operand 2251 states and 2606 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 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) [2021-11-12 22:52:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:58,584 INFO L93 Difference]: Finished difference Result 4335 states and 4885 transitions. [2021-11-12 22:52:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:58,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 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 36 [2021-11-12 22:52:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:58,595 INFO L225 Difference]: With dead ends: 4335 [2021-11-12 22:52:58,595 INFO L226 Difference]: Without dead ends: 4335 [2021-11-12 22:52:58,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:58,597 INFO L933 BasicCegarLoop]: 2413 mSDtfsCounter, 4087 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 2785 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5541.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4094 SdHoareTripleChecker+Valid, 4520 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.54ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6534.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:58,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4094 Valid, 4520 Invalid, 2828 Unknown, 0 Unchecked, 22.54ms Time], IncrementalHoareTripleChecker [43 Valid, 2785 Invalid, 0 Unknown, 0 Unchecked, 6534.67ms Time] [2021-11-12 22:52:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-11-12 22:52:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2247. [2021-11-12 22:52:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 1400 states have (on average 1.8357142857142856) internal successors, (2570), 2231 states have internal predecessors, (2570), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:52:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 2602 transitions. [2021-11-12 22:52:58,672 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 2602 transitions. Word has length 36 [2021-11-12 22:52:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:58,673 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 2602 transitions. [2021-11-12 22:52:58,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 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) [2021-11-12 22:52:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 2602 transitions. [2021-11-12 22:52:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 22:52:58,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:58,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:58,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:58,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:58,891 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:52:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-11-12 22:52:58,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:58,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153307889] [2021-11-12 22:52:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:58,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:58,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:58,895 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:58,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:52:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:52:59,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:59,194 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:52:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:59,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:00,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:00,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153307889] [2021-11-12 22:53:00,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153307889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:00,096 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:00,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:53:00,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60024424] [2021-11-12 22:53:00,096 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:00,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:53:00,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:00,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:53:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:00,098 INFO L87 Difference]: Start difference. First operand 2247 states and 2602 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:22,080 INFO L93 Difference]: Finished difference Result 4238 states and 4664 transitions. [2021-11-12 22:53:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:53:22,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-12 22:53:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:22,093 INFO L225 Difference]: With dead ends: 4238 [2021-11-12 22:53:22,093 INFO L226 Difference]: Without dead ends: 4238 [2021-11-12 22:53:22,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:53:22,094 INFO L933 BasicCegarLoop]: 2733 mSDtfsCounter, 2995 mSDsluCounter, 5218 mSDsCounter, 0 mSdLazyCounter, 5330 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19363.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3000 SdHoareTripleChecker+Valid, 7951 SdHoareTripleChecker+Invalid, 5354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.94ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 5330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21714.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:22,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3000 Valid, 7951 Invalid, 5354 Unknown, 0 Unchecked, 38.94ms Time], IncrementalHoareTripleChecker [24 Valid, 5330 Invalid, 0 Unknown, 0 Unchecked, 21714.83ms Time] [2021-11-12 22:53:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4238 states. [2021-11-12 22:53:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4238 to 2243. [2021-11-12 22:53:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 1400 states have (on average 1.832857142857143) internal successors, (2566), 2227 states have internal predecessors, (2566), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:53:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 2598 transitions. [2021-11-12 22:53:22,147 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 2598 transitions. Word has length 36 [2021-11-12 22:53:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:22,147 INFO L470 AbstractCegarLoop]: Abstraction has 2243 states and 2598 transitions. [2021-11-12 22:53:22,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 2598 transitions. [2021-11-12 22:53:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 22:53:22,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:22,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:22,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:22,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:22,363 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:53:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:22,364 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2021-11-12 22:53:22,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:22,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110618368] [2021-11-12 22:53:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:22,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:22,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:22,367 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:22,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:53:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:22,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:22,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:22,674 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:53:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:22,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:22,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:22,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110618368] [2021-11-12 22:53:22,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110618368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:22,917 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:22,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:53:22,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405245169] [2021-11-12 22:53:22,918 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:22,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:53:22,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:22,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:53:22,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:53:22,919 INFO L87 Difference]: Start difference. First operand 2243 states and 2598 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 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) [2021-11-12 22:53:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:30,345 INFO L93 Difference]: Finished difference Result 4691 states and 5257 transitions. [2021-11-12 22:53:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 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 36 [2021-11-12 22:53:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:30,354 INFO L225 Difference]: With dead ends: 4691 [2021-11-12 22:53:30,354 INFO L226 Difference]: Without dead ends: 4691 [2021-11-12 22:53:30,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:30,356 INFO L933 BasicCegarLoop]: 2250 mSDtfsCounter, 4653 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 2965 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6205.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4663 SdHoareTripleChecker+Valid, 4546 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.11ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7308.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:30,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4663 Valid, 4546 Invalid, 3016 Unknown, 0 Unchecked, 23.11ms Time], IncrementalHoareTripleChecker [51 Valid, 2965 Invalid, 0 Unknown, 0 Unchecked, 7308.99ms Time] [2021-11-12 22:53:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-12 22:53:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 2240. [2021-11-12 22:53:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1400 states have (on average 1.825) internal successors, (2555), 2224 states have internal predecessors, (2555), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:53:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2587 transitions. [2021-11-12 22:53:30,443 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2587 transitions. Word has length 36 [2021-11-12 22:53:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:30,445 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 2587 transitions. [2021-11-12 22:53:30,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 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) [2021-11-12 22:53:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2587 transitions. [2021-11-12 22:53:30,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 22:53:30,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:30,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:30,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:30,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:30,661 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:53:30,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:30,662 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2021-11-12 22:53:30,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:30,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438810866] [2021-11-12 22:53:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:30,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:30,665 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:30,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:53:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:30,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:53:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:30,929 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:53:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:31,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:31,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:31,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438810866] [2021-11-12 22:53:31,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438810866] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:31,779 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:31,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:53:31,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298386279] [2021-11-12 22:53:31,779 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:31,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:53:31,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:31,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:53:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:31,781 INFO L87 Difference]: Start difference. First operand 2240 states and 2587 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:55,659 INFO L93 Difference]: Finished difference Result 4636 states and 5142 transitions. [2021-11-12 22:53:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:53:55,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-12 22:53:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:55,669 INFO L225 Difference]: With dead ends: 4636 [2021-11-12 22:53:55,669 INFO L226 Difference]: Without dead ends: 4636 [2021-11-12 22:53:55,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:53:55,670 INFO L933 BasicCegarLoop]: 2511 mSDtfsCounter, 4787 mSDsluCounter, 4490 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21169.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4792 SdHoareTripleChecker+Valid, 7001 SdHoareTripleChecker+Invalid, 4617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.44ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23632.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:55,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4792 Valid, 7001 Invalid, 4617 Unknown, 0 Unchecked, 35.44ms Time], IncrementalHoareTripleChecker [29 Valid, 4588 Invalid, 0 Unknown, 0 Unchecked, 23632.31ms Time] [2021-11-12 22:53:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-11-12 22:53:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 2240. [2021-11-12 22:53:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1400 states have (on average 1.822142857142857) internal successors, (2551), 2224 states have internal predecessors, (2551), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:53:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2583 transitions. [2021-11-12 22:53:55,721 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2583 transitions. Word has length 36 [2021-11-12 22:53:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:55,722 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 2583 transitions. [2021-11-12 22:53:55,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2583 transitions. [2021-11-12 22:53:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-12 22:53:55,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:55,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:55,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:55,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:55,938 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:53:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:55,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2021-11-12 22:53:55,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:55,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050284423] [2021-11-12 22:53:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:55,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:55,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:55,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:53:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:56,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:56,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:56,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:56,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050284423] [2021-11-12 22:53:56,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050284423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:56,380 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:56,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:53:56,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149748709] [2021-11-12 22:53:56,381 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:56,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:53:56,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:56,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:53:56,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:53:56,382 INFO L87 Difference]: Start difference. First operand 2240 states and 2583 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:56,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:56,465 INFO L93 Difference]: Finished difference Result 2234 states and 2569 transitions. [2021-11-12 22:53:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:56,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-12 22:53:56,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:56,470 INFO L225 Difference]: With dead ends: 2234 [2021-11-12 22:53:56,470 INFO L226 Difference]: Without dead ends: 2234 [2021-11-12 22:53:56,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:56,471 INFO L933 BasicCegarLoop]: 1995 mSDtfsCounter, 959 mSDsluCounter, 3018 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 5013 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.01ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:56,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 5013 Invalid, 43 Unknown, 0 Unchecked, 6.01ms Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 49.15ms Time] [2021-11-12 22:53:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-11-12 22:53:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2234. [2021-11-12 22:53:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 1394 states have (on average 1.8199426111908177) internal successors, (2537), 2218 states have internal predecessors, (2537), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:53:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 2569 transitions. [2021-11-12 22:53:56,510 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 2569 transitions. Word has length 40 [2021-11-12 22:53:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:56,510 INFO L470 AbstractCegarLoop]: Abstraction has 2234 states and 2569 transitions. [2021-11-12 22:53:56,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 2569 transitions. [2021-11-12 22:53:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 22:53:56,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:56,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:56,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:56,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:56,726 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:53:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2021-11-12 22:53:56,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:56,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281818741] [2021-11-12 22:53:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:56,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:56,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:56,729 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:56,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:53:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:56,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:56,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:57,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:57,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:57,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281818741] [2021-11-12 22:53:57,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281818741] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:57,781 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:57,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:53:57,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125792644] [2021-11-12 22:53:57,782 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:57,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:57,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:57,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:57,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:53:57,783 INFO L87 Difference]: Start difference. First operand 2234 states and 2569 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:58,150 INFO L93 Difference]: Finished difference Result 3574 states and 4035 transitions. [2021-11-12 22:53:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:58,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-12 22:53:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:58,155 INFO L225 Difference]: With dead ends: 3574 [2021-11-12 22:53:58,155 INFO L226 Difference]: Without dead ends: 3574 [2021-11-12 22:53:58,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:53:58,156 INFO L933 BasicCegarLoop]: 2084 mSDtfsCounter, 1378 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 3926 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.23ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 337.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:58,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 3926 Invalid, 138 Unknown, 0 Unchecked, 5.23ms Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 337.13ms Time] [2021-11-12 22:53:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2021-11-12 22:53:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 2953. [2021-11-12 22:53:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2109 states have (on average 1.7946894262683737) internal successors, (3785), 2930 states have internal predecessors, (3785), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 22:53:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 3831 transitions. [2021-11-12 22:53:58,213 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 3831 transitions. Word has length 48 [2021-11-12 22:53:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:58,214 INFO L470 AbstractCegarLoop]: Abstraction has 2953 states and 3831 transitions. [2021-11-12 22:53:58,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 3831 transitions. [2021-11-12 22:53:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 22:53:58,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:58,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:58,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:58,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:58,429 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:53:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2021-11-12 22:53:58,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:58,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867640336] [2021-11-12 22:53:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:58,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:58,432 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:58,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:53:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:58,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:58,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:58,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:59,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:59,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867640336] [2021-11-12 22:53:59,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867640336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:59,023 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:59,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:53:59,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191166864] [2021-11-12 22:53:59,024 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:59,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:53:59,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:53:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:53:59,026 INFO L87 Difference]: Start difference. First operand 2953 states and 3831 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:59,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:59,132 INFO L93 Difference]: Finished difference Result 4103 states and 5047 transitions. [2021-11-12 22:53:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:59,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-12 22:53:59,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:59,140 INFO L225 Difference]: With dead ends: 4103 [2021-11-12 22:53:59,140 INFO L226 Difference]: Without dead ends: 4103 [2021-11-12 22:53:59,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:59,142 INFO L933 BasicCegarLoop]: 3270 mSDtfsCounter, 1953 mSDsluCounter, 4567 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1963 SdHoareTripleChecker+Valid, 7837 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.83ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:59,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1963 Valid, 7837 Invalid, 43 Unknown, 0 Unchecked, 9.83ms Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 50.29ms Time] [2021-11-12 22:53:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-11-12 22:53:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 2929. [2021-11-12 22:53:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2085 states have (on average 1.7961630695443644) internal successors, (3745), 2906 states have internal predecessors, (3745), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 22:53:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 3791 transitions. [2021-11-12 22:53:59,239 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 3791 transitions. Word has length 51 [2021-11-12 22:53:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:59,240 INFO L470 AbstractCegarLoop]: Abstraction has 2929 states and 3791 transitions. [2021-11-12 22:53:59,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 3791 transitions. [2021-11-12 22:53:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 22:53:59,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:59,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:59,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:59,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:59,461 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:53:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:59,462 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2021-11-12 22:53:59,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:59,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788950347] [2021-11-12 22:53:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:59,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:59,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:59,464 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:59,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:53:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:59,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:59,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:00,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:00,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788950347] [2021-11-12 22:54:00,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788950347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:00,101 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:00,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:54:00,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783831273] [2021-11-12 22:54:00,101 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:00,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:00,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:00,102 INFO L87 Difference]: Start difference. First operand 2929 states and 3791 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:00,187 INFO L93 Difference]: Finished difference Result 3848 states and 4545 transitions. [2021-11-12 22:54:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-12 22:54:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:00,193 INFO L225 Difference]: With dead ends: 3848 [2021-11-12 22:54:00,193 INFO L226 Difference]: Without dead ends: 3848 [2021-11-12 22:54:00,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:00,194 INFO L933 BasicCegarLoop]: 3311 mSDtfsCounter, 1944 mSDsluCounter, 4658 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1954 SdHoareTripleChecker+Valid, 7969 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.78ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:00,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1954 Valid, 7969 Invalid, 43 Unknown, 0 Unchecked, 8.78ms Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 38.57ms Time] [2021-11-12 22:54:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-11-12 22:54:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 2917. [2021-11-12 22:54:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2073 states have (on average 1.7969126869271588) internal successors, (3725), 2894 states have internal predecessors, (3725), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 22:54:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 3771 transitions. [2021-11-12 22:54:00,248 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 3771 transitions. Word has length 54 [2021-11-12 22:54:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:00,249 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 3771 transitions. [2021-11-12 22:54:00,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 3771 transitions. [2021-11-12 22:54:00,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 22:54:00,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:00,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:00,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:00,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:00,465 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:54:00,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash -665468730, now seen corresponding path program 1 times [2021-11-12 22:54:00,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:00,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432257489] [2021-11-12 22:54:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:00,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:00,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:00,467 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:00,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:54:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:00,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:00,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:00,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:00,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:00,806 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-12 22:54:00,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-12 22:54:00,858 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 22:54:00,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-12 22:54:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:00,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:01,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:01,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432257489] [2021-11-12 22:54:01,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432257489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:01,162 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:01,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:54:01,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932582858] [2021-11-12 22:54:01,162 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:01,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:54:01,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:01,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:54:01,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:01,164 INFO L87 Difference]: Start difference. First operand 2917 states and 3771 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:04,733 INFO L93 Difference]: Finished difference Result 3022 states and 3882 transitions. [2021-11-12 22:54:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:04,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 22:54:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:04,738 INFO L225 Difference]: With dead ends: 3022 [2021-11-12 22:54:04,738 INFO L226 Difference]: Without dead ends: 3022 [2021-11-12 22:54:04,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:04,740 INFO L933 BasicCegarLoop]: 1886 mSDtfsCounter, 903 mSDsluCounter, 6545 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3080.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 8431 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.80ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3501.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:04,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 8431 Invalid, 819 Unknown, 0 Unchecked, 11.80ms Time], IncrementalHoareTripleChecker [3 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 3501.23ms Time] [2021-11-12 22:54:04,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-11-12 22:54:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2883. [2021-11-12 22:54:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2039 states have (on average 1.8097106424718) internal successors, (3690), 2860 states have internal predecessors, (3690), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 22:54:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 3736 transitions. [2021-11-12 22:54:04,789 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 3736 transitions. Word has length 57 [2021-11-12 22:54:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:04,789 INFO L470 AbstractCegarLoop]: Abstraction has 2883 states and 3736 transitions. [2021-11-12 22:54:04,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 3736 transitions. [2021-11-12 22:54:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 22:54:04,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:04,791 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:04,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:05,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:05,005 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:54:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:05,005 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2021-11-12 22:54:05,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:05,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524564424] [2021-11-12 22:54:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:05,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:05,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:05,010 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:05,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:54:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:05,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:05,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:05,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:06,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:06,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524564424] [2021-11-12 22:54:06,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524564424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:06,302 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:06,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:06,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084216453] [2021-11-12 22:54:06,302 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:06,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:06,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:06,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:06,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:06,304 INFO L87 Difference]: Start difference. First operand 2883 states and 3736 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:06,546 INFO L93 Difference]: Finished difference Result 4147 states and 5185 transitions. [2021-11-12 22:54:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-12 22:54:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:06,554 INFO L225 Difference]: With dead ends: 4147 [2021-11-12 22:54:06,555 INFO L226 Difference]: Without dead ends: 4147 [2021-11-12 22:54:06,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:06,556 INFO L933 BasicCegarLoop]: 2356 mSDtfsCounter, 1075 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 4227 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.03ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:06,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 4227 Invalid, 64 Unknown, 0 Unchecked, 6.03ms Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 207.48ms Time] [2021-11-12 22:54:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-11-12 22:54:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3606. [2021-11-12 22:54:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 2758 states have (on average 1.777012327773749) internal successors, (4901), 3576 states have internal predecessors, (4901), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 22:54:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 4961 transitions. [2021-11-12 22:54:06,622 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 4961 transitions. Word has length 59 [2021-11-12 22:54:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 4961 transitions. [2021-11-12 22:54:06,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 4961 transitions. [2021-11-12 22:54:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:54:06,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:06,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:06,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:06,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:06,840 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:54:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2021-11-12 22:54:06,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:06,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211874261] [2021-11-12 22:54:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:06,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:06,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:06,842 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:06,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:54:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:07,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:54:07,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:07,268 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:54:07,276 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:54:08,118 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-12 22:54:08,118 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 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-12 22:54:08,127 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 22:54:08,127 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 25 treesize of output 21 [2021-11-12 22:54:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:08,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:13,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:13,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211874261] [2021-11-12 22:54:13,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211874261] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:13,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:13,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:54:13,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335483347] [2021-11-12 22:54:13,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:13,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:54:13,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:54:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-12 22:54:13,737 INFO L87 Difference]: Start difference. First operand 3606 states and 4961 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:28,982 INFO L93 Difference]: Finished difference Result 7022 states and 9543 transitions. [2021-11-12 22:54:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:28,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 62 [2021-11-12 22:54:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:28,990 INFO L225 Difference]: With dead ends: 7022 [2021-11-12 22:54:28,990 INFO L226 Difference]: Without dead ends: 7022 [2021-11-12 22:54:28,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:54:28,991 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 2804 mSDsluCounter, 3339 mSDsCounter, 0 mSdLazyCounter, 3283 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13003.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2819 SdHoareTripleChecker+Valid, 4511 SdHoareTripleChecker+Invalid, 6991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.32ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3633 IncrementalHoareTripleChecker+Unchecked, 15048.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:28,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2819 Valid, 4511 Invalid, 6991 Unknown, 0 Unchecked, 32.32ms Time], IncrementalHoareTripleChecker [75 Valid, 3283 Invalid, 0 Unknown, 3633 Unchecked, 15048.94ms Time] [2021-11-12 22:54:28,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7022 states. [2021-11-12 22:54:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7022 to 3733. [2021-11-12 22:54:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 2917 states have (on average 1.750771340418238) internal successors, (5107), 3700 states have internal predecessors, (5107), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-12 22:54:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 5173 transitions. [2021-11-12 22:54:29,077 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 5173 transitions. Word has length 62 [2021-11-12 22:54:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:29,078 INFO L470 AbstractCegarLoop]: Abstraction has 3733 states and 5173 transitions. [2021-11-12 22:54:29,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 5173 transitions. [2021-11-12 22:54:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 22:54:29,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:29,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:29,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:29,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:29,292 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr75REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:54:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash -773371597, now seen corresponding path program 1 times [2021-11-12 22:54:29,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:29,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156250386] [2021-11-12 22:54:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:29,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:29,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:29,295 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:29,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:54:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:29,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:29,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:29,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:29,894 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 8 treesize of output 6 [2021-11-12 22:54:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:30,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:30,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156250386] [2021-11-12 22:54:30,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156250386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:30,223 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:30,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:54:30,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851389011] [2021-11-12 22:54:30,223 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:30,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:54:30,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:54:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:30,225 INFO L87 Difference]: Start difference. First operand 3733 states and 5173 transitions. Second operand has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:33,567 INFO L93 Difference]: Finished difference Result 3731 states and 5169 transitions. [2021-11-12 22:54:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:33,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 [2021-11-12 22:54:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:33,572 INFO L225 Difference]: With dead ends: 3731 [2021-11-12 22:54:33,572 INFO L226 Difference]: Without dead ends: 3731 [2021-11-12 22:54:33,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:33,573 INFO L933 BasicCegarLoop]: 1176 mSDtfsCounter, 4975 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2834.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4985 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.39ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3289.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:33,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4985 Valid, 1670 Invalid, 881 Unknown, 0 Unchecked, 11.39ms Time], IncrementalHoareTripleChecker [48 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 3289.94ms Time] [2021-11-12 22:54:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-11-12 22:54:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3731. [2021-11-12 22:54:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 2917 states have (on average 1.7494000685635926) internal successors, (5103), 3698 states have internal predecessors, (5103), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-12 22:54:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5169 transitions. [2021-11-12 22:54:33,629 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5169 transitions. Word has length 64 [2021-11-12 22:54:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:33,630 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5169 transitions. [2021-11-12 22:54:33,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5169 transitions. [2021-11-12 22:54:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 22:54:33,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:33,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:33,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:33,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:33,845 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:54:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:33,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2021-11-12 22:54:33,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:33,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848108011] [2021-11-12 22:54:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:33,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:33,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:33,848 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:33,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:54:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:34,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:34,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:34,281 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:54:34,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-12 22:54:34,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 [2021-11-12 22:54:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:34,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:34,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:34,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848108011] [2021-11-12 22:54:34,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848108011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:34,490 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:34,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:54:34,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807472364] [2021-11-12 22:54:34,490 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:34,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:34,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:34,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:34,491 INFO L87 Difference]: Start difference. First operand 3731 states and 5169 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:40,986 INFO L93 Difference]: Finished difference Result 3730 states and 5167 transitions. [2021-11-12 22:54:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:54:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2021-11-12 22:54:40,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:40,992 INFO L225 Difference]: With dead ends: 3730 [2021-11-12 22:54:40,992 INFO L226 Difference]: Without dead ends: 3730 [2021-11-12 22:54:40,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:40,993 INFO L933 BasicCegarLoop]: 1964 mSDtfsCounter, 4 mSDsluCounter, 3252 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5519.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5216 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6395.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:40,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 5216 Invalid, 2646 Unknown, 0 Unchecked, 16.31ms Time], IncrementalHoareTripleChecker [1 Valid, 2645 Invalid, 0 Unknown, 0 Unchecked, 6395.91ms Time] [2021-11-12 22:54:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2021-11-12 22:54:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3730. [2021-11-12 22:54:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 2917 states have (on average 1.7487144326362702) internal successors, (5101), 3697 states have internal predecessors, (5101), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-12 22:54:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 5167 transitions. [2021-11-12 22:54:41,049 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 5167 transitions. Word has length 67 [2021-11-12 22:54:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:41,050 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 5167 transitions. [2021-11-12 22:54:41,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 5167 transitions. [2021-11-12 22:54:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 22:54:41,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:41,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:41,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:41,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:41,267 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:54:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2021-11-12 22:54:41,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:41,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085109147] [2021-11-12 22:54:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:41,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:41,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:41,270 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:41,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:54:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:41,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:54:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:41,642 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:54:41,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-12 22:54:41,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:54:41,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 27 [2021-11-12 22:54:41,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 [2021-11-12 22:54:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:41,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:42,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:42,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085109147] [2021-11-12 22:54:42,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085109147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:42,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:42,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-12 22:54:42,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156161094] [2021-11-12 22:54:42,195 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:42,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:54:42,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:42,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:54:42,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:54:42,196 INFO L87 Difference]: Start difference. First operand 3730 states and 5167 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:03,557 INFO L93 Difference]: Finished difference Result 3729 states and 5165 transitions. [2021-11-12 22:55:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-11-12 22:55:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:03,562 INFO L225 Difference]: With dead ends: 3729 [2021-11-12 22:55:03,562 INFO L226 Difference]: Without dead ends: 3729 [2021-11-12 22:55:03,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:55:03,563 INFO L933 BasicCegarLoop]: 1964 mSDtfsCounter, 2 mSDsluCounter, 6354 mSDsCounter, 0 mSdLazyCounter, 5433 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19008.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8318 SdHoareTripleChecker+Invalid, 5434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.13ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21181.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:03,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8318 Invalid, 5434 Unknown, 0 Unchecked, 31.13ms Time], IncrementalHoareTripleChecker [1 Valid, 5433 Invalid, 0 Unknown, 0 Unchecked, 21181.32ms Time] [2021-11-12 22:55:03,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-11-12 22:55:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3729. [2021-11-12 22:55:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 2915 states have (on average 1.7492281303602057) internal successors, (5099), 3696 states have internal predecessors, (5099), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-12 22:55:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 5165 transitions. [2021-11-12 22:55:03,601 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 5165 transitions. Word has length 67 [2021-11-12 22:55:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:03,601 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 5165 transitions. [2021-11-12 22:55:03,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 5165 transitions. [2021-11-12 22:55:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 22:55:03,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:03,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:03,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:03,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:03,803 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:55:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2021-11-12 22:55:03,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:03,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637181542] [2021-11-12 22:55:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:03,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:03,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:03,805 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:03,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:55:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:55:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:04,130 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:55:04,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-12 22:55:04,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 [2021-11-12 22:55:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:04,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:04,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:04,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637181542] [2021-11-12 22:55:04,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637181542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:04,290 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:04,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:55:04,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848682611] [2021-11-12 22:55:04,290 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:04,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:04,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:04,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:04,291 INFO L87 Difference]: Start difference. First operand 3729 states and 5165 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:10,038 INFO L93 Difference]: Finished difference Result 3728 states and 5161 transitions. [2021-11-12 22:55:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:10,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2021-11-12 22:55:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:10,043 INFO L225 Difference]: With dead ends: 3728 [2021-11-12 22:55:10,043 INFO L226 Difference]: Without dead ends: 3728 [2021-11-12 22:55:10,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:10,044 INFO L933 BasicCegarLoop]: 1960 mSDtfsCounter, 7 mSDsluCounter, 3244 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4901.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5204 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5656.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:10,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 5204 Invalid, 2647 Unknown, 0 Unchecked, 14.47ms Time], IncrementalHoareTripleChecker [1 Valid, 2646 Invalid, 0 Unknown, 0 Unchecked, 5656.12ms Time] [2021-11-12 22:55:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-11-12 22:55:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3728. [2021-11-12 22:55:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 2915 states have (on average 1.7478559176672384) internal successors, (5095), 3695 states have internal predecessors, (5095), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-12 22:55:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 5161 transitions. [2021-11-12 22:55:10,079 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 5161 transitions. Word has length 67 [2021-11-12 22:55:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:10,079 INFO L470 AbstractCegarLoop]: Abstraction has 3728 states and 5161 transitions. [2021-11-12 22:55:10,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 5161 transitions. [2021-11-12 22:55:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 22:55:10,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:10,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:10,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:10,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:10,281 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:55:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2021-11-12 22:55:10,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:10,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079675859] [2021-11-12 22:55:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:10,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:10,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:10,283 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:10,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:55:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:10,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:55:10,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:10,600 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:55:10,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:55:10,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-12 22:55:10,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 27 [2021-11-12 22:55:10,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 [2021-11-12 22:55:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:10,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:10,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:10,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079675859] [2021-11-12 22:55:10,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079675859] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:10,980 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:10,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-12 22:55:10,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749068027] [2021-11-12 22:55:10,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:10,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:10,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:55:10,982 INFO L87 Difference]: Start difference. First operand 3728 states and 5161 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:32,565 INFO L93 Difference]: Finished difference Result 3727 states and 5157 transitions. [2021-11-12 22:55:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:32,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-11-12 22:55:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:32,570 INFO L225 Difference]: With dead ends: 3727 [2021-11-12 22:55:32,570 INFO L226 Difference]: Without dead ends: 3727 [2021-11-12 22:55:32,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:55:32,573 INFO L933 BasicCegarLoop]: 1959 mSDtfsCounter, 5 mSDsluCounter, 6348 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19235.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8307 SdHoareTripleChecker+Invalid, 5425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.08ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21421.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:32,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 8307 Invalid, 5425 Unknown, 0 Unchecked, 31.08ms Time], IncrementalHoareTripleChecker [1 Valid, 5424 Invalid, 0 Unknown, 0 Unchecked, 21421.36ms Time] [2021-11-12 22:55:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-11-12 22:55:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3727. [2021-11-12 22:55:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 2911 states have (on average 1.7488835451734799) internal successors, (5091), 3694 states have internal predecessors, (5091), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-12 22:55:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5157 transitions. [2021-11-12 22:55:32,630 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5157 transitions. Word has length 67 [2021-11-12 22:55:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:32,630 INFO L470 AbstractCegarLoop]: Abstraction has 3727 states and 5157 transitions. [2021-11-12 22:55:32,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5157 transitions. [2021-11-12 22:55:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:55:32,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:32,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:32,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:32,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:32,844 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:55:32,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1448028751, now seen corresponding path program 1 times [2021-11-12 22:55:32,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:32,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648911241] [2021-11-12 22:55:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:32,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:32,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:32,848 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:32,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:55:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:33,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:33,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:33,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:33,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:33,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648911241] [2021-11-12 22:55:33,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648911241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:33,580 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:33,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:55:33,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921777949] [2021-11-12 22:55:33,581 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:33,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:55:33,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:55:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:33,582 INFO L87 Difference]: Start difference. First operand 3727 states and 5157 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:55:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:33,713 INFO L93 Difference]: Finished difference Result 3737 states and 5174 transitions. [2021-11-12 22:55:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:33,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2021-11-12 22:55:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:33,727 INFO L225 Difference]: With dead ends: 3737 [2021-11-12 22:55:33,727 INFO L226 Difference]: Without dead ends: 3737 [2021-11-12 22:55:33,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:55:33,728 INFO L933 BasicCegarLoop]: 1960 mSDtfsCounter, 11 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3919 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.45ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:33,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3919 Invalid, 46 Unknown, 0 Unchecked, 3.45ms Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 85.23ms Time] [2021-11-12 22:55:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-11-12 22:55:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3737. [2021-11-12 22:55:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 2919 states have (on average 1.7482014388489209) internal successors, (5103), 3703 states have internal predecessors, (5103), 33 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (38), 30 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-12 22:55:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 5174 transitions. [2021-11-12 22:55:33,867 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 5174 transitions. Word has length 75 [2021-11-12 22:55:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:33,868 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 5174 transitions. [2021-11-12 22:55:33,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:55:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 5174 transitions. [2021-11-12 22:55:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 22:55:33,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:33,869 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:33,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:34,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:34,080 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:55:34,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1921538705, now seen corresponding path program 1 times [2021-11-12 22:55:34,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:34,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706221] [2021-11-12 22:55:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:34,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:34,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:34,082 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:34,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:55:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:55:34,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:34,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:34,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:34,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706221] [2021-11-12 22:55:34,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:34,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218667200] [2021-11-12 22:55:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:34,853 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:55:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:55:34,856 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:55:34,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 22:55:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:55:35,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:35,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:35,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218667200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:35,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091574872] [2021-11-12 22:55:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:35,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:55:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:55:35,805 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:55:35,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 22:55:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:36,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:55:36,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:36,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:36,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091574872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:36,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:55:36,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-12 22:55:36,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987458091] [2021-11-12 22:55:36,574 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:55:36,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:55:36,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:55:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:55:36,576 INFO L87 Difference]: Start difference. First operand 3737 states and 5174 transitions. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:55:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:37,261 INFO L93 Difference]: Finished difference Result 3751 states and 5195 transitions. [2021-11-12 22:55:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:55:37,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-12 22:55:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:37,273 INFO L225 Difference]: With dead ends: 3751 [2021-11-12 22:55:37,274 INFO L226 Difference]: Without dead ends: 3745 [2021-11-12 22:55:37,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:55:37,275 INFO L933 BasicCegarLoop]: 1960 mSDtfsCounter, 43 mSDsluCounter, 5873 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 276.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 7833 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.88ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:37,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 7833 Invalid, 173 Unknown, 0 Unchecked, 6.88ms Time], IncrementalHoareTripleChecker [45 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 365.70ms Time] [2021-11-12 22:55:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-11-12 22:55:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3743. [2021-11-12 22:55:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 2925 states have (on average 1.747008547008547) internal successors, (5110), 3709 states have internal predecessors, (5110), 33 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (38), 30 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-12 22:55:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 5181 transitions. [2021-11-12 22:55:37,342 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 5181 transitions. Word has length 77 [2021-11-12 22:55:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:37,342 INFO L470 AbstractCegarLoop]: Abstraction has 3743 states and 5181 transitions. [2021-11-12 22:55:37,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:55:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 5181 transitions. [2021-11-12 22:55:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:55:37,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:37,344 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:37,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:37,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:37,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-12 22:55:37,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:55:37,965 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-12 22:55:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash -962346065, now seen corresponding path program 2 times [2021-11-12 22:55:37,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:37,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216646351] [2021-11-12 22:55:37,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:55:37,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:37,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:37,967 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:37,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:55:38,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:55:38,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:55:38,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:38,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:38,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:39,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:39,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216646351] [2021-11-12 22:55:39,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216646351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:39,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1715405649] [2021-11-12 22:55:39,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:55:39,214 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:55:39,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:55:39,215 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:55:39,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 22:55:40,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:55:40,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:55:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:40,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:40,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1715405649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:40,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978895187] [2021-11-12 22:55:40,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:55:40,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:55:40,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:55:40,740 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:55:40,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a8e33ee-d842-4195-9692-dd2e347c44b3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-12 22:56:04,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:56:04,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:56:04,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:56:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:05,011 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-12 22:56:05,012 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 13 treesize of output 13 [2021-11-12 22:56:05,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-12 22:57:54,264 WARN L227 SmtUtils]: Spent 23.07s on a formula simplification. DAG size of input: 114 DAG size of output: 34 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:57:54,265 INFO L354 Elim1Store]: treesize reduction 884, result has 5.9 percent of original size [2021-11-12 22:57:54,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 81 [2021-11-12 22:57:55,090 INFO L354 Elim1Store]: treesize reduction 276, result has 0.4 percent of original size [2021-11-12 22:57:55,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 127 treesize of output 40 [2021-11-12 22:57:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 15 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:57:55,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:57,249 INFO L354 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2021-11-12 22:57:57,250 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 65 treesize of output 64 [2021-11-12 23:03:56,834 INFO L354 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2021-11-12 23:03:56,835 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 119 treesize of output 118 [2021-11-12 23:04:00,150 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_120| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|#Ultimate.C_memset_#t~loopctr501| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_112| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_114| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_116| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_118| (_ BitVec 32)) (|#Ultimate.C_memset_#ptr.offset| (_ BitVec 32))) (or (exists ((|v_#Ultimate.C_memset_#t~loopctr501_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_106| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_109| (_ BitVec 32))) (not (= |c_#Ultimate.C_memset_#ptr.base| (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_105| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_109| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_108| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_107| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_106| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_104| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))))) (= |c_#Ultimate.C_memset_#ptr.base| (select (select (store |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr501|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_120| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_118| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_116| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_114| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_112| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))))) is different from false [2021-11-12 23:04:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 21 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:21,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978895187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:21,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:04:21,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 15, 15] total 45 [2021-11-12 23:04:21,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906113860] [2021-11-12 23:04:21,092 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:04:21,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-12 23:04:21,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-12 23:04:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1522, Unknown=208, NotChecked=84, Total=1980 [2021-11-12 23:04:21,095 INFO L87 Difference]: Start difference. First operand 3743 states and 5181 transitions. Second operand has 45 states, 43 states have (on average 5.372093023255814) internal successors, (231), 43 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 23:04:27,315 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_120| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|#Ultimate.C_memset_#t~loopctr501| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_112| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_114| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_116| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_118| (_ BitVec 32)) (|#Ultimate.C_memset_#ptr.offset| (_ BitVec 32))) (or (exists ((|v_#Ultimate.C_memset_#t~loopctr501_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_106| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_109| (_ BitVec 32))) (not (= |c_#Ultimate.C_memset_#ptr.base| (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_105| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_109| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_108| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_107| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_106| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_104| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))))) (= |c_#Ultimate.C_memset_#ptr.base| (select (select (store |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr501|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_120| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_118| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_116| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_114| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_112| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))))) (= |c_old(#memory_$Pointer$.base)| |c_#memory_$Pointer$.base|)) is different from false [2021-11-12 23:04:51,698 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_#Ultimate.C_memset_#ptr.base|)) (_ bv1 1))) (forall ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|#Ultimate.C_memset_#t~loopctr501| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_112| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_114| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_116| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_118| (_ BitVec 32))) (or (exists ((|v_#Ultimate.C_memset_#t~loopctr501_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_106| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr501_109| (_ BitVec 32))) (not (= |c_#Ultimate.C_memset_#ptr.base| (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_105| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_109| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_108| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_107| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_106| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_104| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (select |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr501|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr501_118|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr501_116|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr501_114|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr501_112|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)))))))))))))) (_ bv1 1))))) (= (_ bv1 32) |c_#Ultimate.C_memset_#t~loopctr501|) (exists ((|v_#Ultimate.C_memset_#t~loopctr501_83| (_ BitVec 32))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#t~loopctr501_83| |c_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) |c_#memory_$Pointer$.base|))) is different from false