./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/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_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67499ec0709cfdcc368630c5b1d94f26157589b8bf16f22cf5d62554760c6dd7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:23:40,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:23:40,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:23:40,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:23:40,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:23:40,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:23:40,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:23:40,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:23:40,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:23:40,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:23:40,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:23:40,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:23:40,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:23:40,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:23:40,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:23:40,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:23:40,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:23:40,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:23:40,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:23:40,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:23:40,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:23:40,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:23:40,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:23:40,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:23:40,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:23:40,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:23:40,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:23:40,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:23:40,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:23:40,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:23:40,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:23:40,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:23:40,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:23:40,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:23:40,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:23:40,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:23:40,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:23:40,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:23:40,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:23:40,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:23:40,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:23:40,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:23:40,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:23:40,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:23:40,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:23:40,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:23:40,630 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:23:40,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:23:40,630 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:23:40,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:23:40,630 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:23:40,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:23:40,631 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:23:40,631 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:23:40,631 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:23:40,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:23:40,632 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:23:40,632 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:23:40,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:23:40,633 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:23:40,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:23:40,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:23:40,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:23:40,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:23:40,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:23:40,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:23:40,634 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:23:40,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:23:40,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:23:40,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:23:40,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:23:40,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:23:40,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:23:40,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:40,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:23:40,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:23:40,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:23:40,636 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:23:40,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:23:40,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:23:40,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:23:40,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:23:40,637 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_6027b93d-baad-4f3c-80ee-188eb36701c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67499ec0709cfdcc368630c5b1d94f26157589b8bf16f22cf5d62554760c6dd7 [2021-11-12 22:23:40,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:23:40,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:23:40,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:23:40,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:23:40,911 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:23:40,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i [2021-11-12 22:23:41,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data/e2e894aaf/dee01f355afd4ec2a6d655169753d20c/FLAG851a1e4f0 [2021-11-12 22:23:41,503 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:23:41,504 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i [2021-11-12 22:23:41,523 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data/e2e894aaf/dee01f355afd4ec2a6d655169753d20c/FLAG851a1e4f0 [2021-11-12 22:23:41,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data/e2e894aaf/dee01f355afd4ec2a6d655169753d20c [2021-11-12 22:23:41,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:23:41,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:23:41,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:41,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:23:41,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:23:41,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:41" (1/1) ... [2021-11-12 22:23:41,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569f8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:41, skipping insertion in model container [2021-11-12 22:23:41,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:41" (1/1) ... [2021-11-12 22:23:41,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:23:41,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:42,288 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[33021,33034] [2021-11-12 22:23:42,379 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[44124,44137] [2021-11-12 22:23:42,381 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[44245,44258] [2021-11-12 22:23:42,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:42,396 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 22:23:42,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a4c65ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:42, skipping insertion in model container [2021-11-12 22:23:42,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:42,397 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:23:42,399 INFO L158 Benchmark]: Toolchain (without parser) took 601.36ms. Allocated memory is still 98.6MB. Free memory was 64.2MB in the beginning and 65.4MB in the end (delta: -1.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:23:42,400 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory was 53.1MB in the beginning and 53.0MB in the end (delta: 24.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:23:42,401 INFO L158 Benchmark]: CACSL2BoogieTranslator took 596.55ms. Allocated memory is still 98.6MB. Free memory was 64.0MB in the beginning and 65.4MB in the end (delta: -1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:23:42,403 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory was 53.1MB in the beginning and 53.0MB in the end (delta: 24.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 596.55ms. Allocated memory is still 98.6MB. Free memory was 64.0MB in the beginning and 65.4MB in the end (delta: -1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: 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_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/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_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67499ec0709cfdcc368630c5b1d94f26157589b8bf16f22cf5d62554760c6dd7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:23:44,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:23:44,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:23:44,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:23:44,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:23:44,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:23:44,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:23:44,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:23:44,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:23:44,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:23:44,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:23:44,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:23:44,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:23:44,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:23:44,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:23:44,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:23:44,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:23:44,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:23:44,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:23:44,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:23:44,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:23:44,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:23:44,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:23:44,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:23:44,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:23:44,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:23:44,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:23:44,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:23:44,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:23:44,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:23:44,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:23:44,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:23:44,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:23:44,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:23:44,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:23:44,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:23:44,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:23:44,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:23:44,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:23:44,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:23:44,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:23:44,750 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:23:44,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:23:44,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:23:44,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:23:44,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:23:44,795 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:23:44,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:23:44,795 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:23:44,795 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:23:44,796 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:23:44,796 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:23:44,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:23:44,799 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:23:44,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:23:44,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:23:44,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:23:44,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:23:44,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:23:44,800 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:23:44,800 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:23:44,801 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:23:44,801 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:23:44,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:23:44,801 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:23:44,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:23:44,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:23:44,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:23:44,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:23:44,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:44,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:23:44,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:23:44,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:23:44,804 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:23:44,804 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:23:44,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:23:44,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:23:44,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:23:44,805 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_6027b93d-baad-4f3c-80ee-188eb36701c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67499ec0709cfdcc368630c5b1d94f26157589b8bf16f22cf5d62554760c6dd7 [2021-11-12 22:23:45,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:23:45,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:23:45,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:23:45,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:23:45,270 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:23:45,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i [2021-11-12 22:23:45,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data/cd7c9a392/d24fc89f1d4e46c38946c1d8e4a9626c/FLAG250bcee9e [2021-11-12 22:23:46,047 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:23:46,047 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i [2021-11-12 22:23:46,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data/cd7c9a392/d24fc89f1d4e46c38946c1d8e4a9626c/FLAG250bcee9e [2021-11-12 22:23:46,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/data/cd7c9a392/d24fc89f1d4e46c38946c1d8e4a9626c [2021-11-12 22:23:46,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:23:46,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:23:46,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:46,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:23:46,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:23:46,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:46" (1/1) ... [2021-11-12 22:23:46,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfa2cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:46, skipping insertion in model container [2021-11-12 22:23:46,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:46" (1/1) ... [2021-11-12 22:23:46,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:23:46,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:46,760 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[33021,33034] [2021-11-12 22:23:46,921 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[44124,44137] [2021-11-12 22:23:46,923 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[44245,44258] [2021-11-12 22:23:46,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:46,958 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:23:46,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:47,031 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[33021,33034] [2021-11-12 22:23:47,128 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[44124,44137] [2021-11-12 22:23:47,129 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[44245,44258] [2021-11-12 22:23:47,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:47,145 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:23:47,172 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[33021,33034] [2021-11-12 22:23:47,226 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[44124,44137] [2021-11-12 22:23:47,227 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_6027b93d-baad-4f3c-80ee-188eb36701c0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i[44245,44258] [2021-11-12 22:23:47,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:47,300 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:23:47,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47 WrapperNode [2021-11-12 22:23:47,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:47,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:23:47,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:23:47,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:23:47,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:23:47,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:23:47,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:23:47,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:23:47,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:23:47,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:23:47,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:23:47,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:23:47,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:47,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:23:47,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:23:47,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:23:47,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:23:47,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:23:47,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:23:47,694 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:23:47,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:23:47,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:23:47,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:23:47,695 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 22:23:47,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:23:47,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:23:47,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:23:47,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:23:47,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:23:47,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:23:54,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:23:54,512 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-12 22:23:54,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:23:54 BoogieIcfgContainer [2021-11-12 22:23:54,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:23:54,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:23:54,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:23:54,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:23:54,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:23:46" (1/3) ... [2021-11-12 22:23:54,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75867eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:23:54, skipping insertion in model container [2021-11-12 22:23:54,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (2/3) ... [2021-11-12 22:23:54,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75867eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:23:54, skipping insertion in model container [2021-11-12 22:23:54,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:23:54" (3/3) ... [2021-11-12 22:23:54,522 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test7-1.i [2021-11-12 22:23:54,527 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:23:54,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 22:23:54,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:23:54,576 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:23:54,578 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 22:23:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 179 states have (on average 1.6983240223463687) internal successors, (304), 181 states have internal predecessors, (304), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:23:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:23:54,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:54,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:54,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:54,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2094566776, now seen corresponding path program 1 times [2021-11-12 22:23:54,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:54,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440375825] [2021-11-12 22:23:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:54,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:54,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:54,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:54,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:23:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:54,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:23:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:54,839 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 22:23:54,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:54,868 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 22:23:54,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:54,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440375825] [2021-11-12 22:23:54,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440375825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:54,872 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:54,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:23:54,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499179623] [2021-11-12 22:23:54,874 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:54,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:23:54,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:23:54,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:23:54,917 INFO L87 Difference]: Start difference. First operand has 186 states, 179 states have (on average 1.6983240223463687) internal successors, (304), 181 states have internal predecessors, (304), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 22:23:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:54,989 INFO L93 Difference]: Finished difference Result 369 states and 617 transitions. [2021-11-12 22:23:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:23:54,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 22:23:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:55,015 INFO L225 Difference]: With dead ends: 369 [2021-11-12 22:23:55,016 INFO L226 Difference]: Without dead ends: 181 [2021-11-12 22:23:55,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:23:55,026 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:55,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 4.90ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:23:55,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-12 22:23:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-12 22:23:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.3142857142857143) internal successors, (230), 176 states have internal predecessors, (230), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:23:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 236 transitions. [2021-11-12 22:23:55,106 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 236 transitions. Word has length 8 [2021-11-12 22:23:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:55,107 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 236 transitions. [2021-11-12 22:23:55,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 22:23:55,108 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 236 transitions. [2021-11-12 22:23:55,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 22:23:55,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:55,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:55,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:55,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:55,326 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash -716312389, now seen corresponding path program 1 times [2021-11-12 22:23:55,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:55,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844457360] [2021-11-12 22:23:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:55,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:55,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:55,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:55,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:23:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:23:55,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:55,619 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 22:23:55,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:55,738 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 22:23:55,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:55,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844457360] [2021-11-12 22:23:55,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844457360] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:55,747 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:55,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:23:55,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740367775] [2021-11-12 22:23:55,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:55,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:23:55,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:55,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:23:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:23:55,757 INFO L87 Difference]: Start difference. First operand 181 states and 236 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 22:23:58,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:00,289 INFO L93 Difference]: Finished difference Result 468 states and 614 transitions. [2021-11-12 22:24:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:00,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-12 22:24:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:00,295 INFO L225 Difference]: With dead ends: 468 [2021-11-12 22:24:00,295 INFO L226 Difference]: Without dead ends: 287 [2021-11-12 22:24:00,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 22:24:00,298 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 140 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4301.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.80ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4472.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:00,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 623 Invalid, 79 Unknown, 0 Unchecked, 6.80ms Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 1 Unknown, 0 Unchecked, 4472.20ms Time] [2021-11-12 22:24:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-12 22:24:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2021-11-12 22:24:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.3201438848920863) internal successors, (367), 279 states have internal predecessors, (367), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:24:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 373 transitions. [2021-11-12 22:24:00,321 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 373 transitions. Word has length 10 [2021-11-12 22:24:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:00,321 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 373 transitions. [2021-11-12 22:24:00,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 22:24:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 373 transitions. [2021-11-12 22:24:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 22:24:00,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:00,323 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] [2021-11-12 22:24:00,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:00,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:00,536 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:00,537 INFO L85 PathProgramCache]: Analyzing trace with hash -294024543, now seen corresponding path program 1 times [2021-11-12 22:24:00,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:00,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950255780] [2021-11-12 22:24:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:00,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:00,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:00,540 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:00,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:24:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:24:00,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:00,865 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 22:24:00,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:01,070 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 22:24:01,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:01,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950255780] [2021-11-12 22:24:01,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950255780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:01,071 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:01,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:24:01,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436354269] [2021-11-12 22:24:01,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:01,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:24:01,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:01,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:24:01,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:24:01,073 INFO L87 Difference]: Start difference. First operand 284 states and 373 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:24:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:01,214 INFO L93 Difference]: Finished difference Result 454 states and 597 transitions. [2021-11-12 22:24:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-12 22:24:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:01,217 INFO L225 Difference]: With dead ends: 454 [2021-11-12 22:24:01,217 INFO L226 Difference]: Without dead ends: 306 [2021-11-12 22:24:01,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:24:01,219 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 103 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:01,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 744 Invalid, 81 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [32 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 121.19ms Time] [2021-11-12 22:24:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-12 22:24:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 290. [2021-11-12 22:24:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 284 states have (on average 1.2570422535211268) internal successors, (357), 285 states have internal predecessors, (357), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:24:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 363 transitions. [2021-11-12 22:24:01,238 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 363 transitions. Word has length 44 [2021-11-12 22:24:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:01,239 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 363 transitions. [2021-11-12 22:24:01,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:24:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 363 transitions. [2021-11-12 22:24:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 22:24:01,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:01,241 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] [2021-11-12 22:24:01,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:01,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:01,459 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:01,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1193467565, now seen corresponding path program 1 times [2021-11-12 22:24:01,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:01,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283741048] [2021-11-12 22:24:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:01,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:01,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:01,462 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:01,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:24:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:24:01,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:01,817 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 22:24:01,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:02,236 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 22:24:02,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:02,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283741048] [2021-11-12 22:24:02,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283741048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:02,237 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:02,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-12 22:24:02,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195481778] [2021-11-12 22:24:02,237 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:02,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:24:02,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:02,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:24:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:24:02,238 INFO L87 Difference]: Start difference. First operand 290 states and 363 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:24:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:02,371 INFO L93 Difference]: Finished difference Result 446 states and 551 transitions. [2021-11-12 22:24:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-12 22:24:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:02,374 INFO L225 Difference]: With dead ends: 446 [2021-11-12 22:24:02,374 INFO L226 Difference]: Without dead ends: 292 [2021-11-12 22:24:02,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:24:02,376 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 87 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.40ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:02,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 868 Invalid, 70 Unknown, 0 Unchecked, 3.40ms Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 114.21ms Time] [2021-11-12 22:24:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-12 22:24:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 278. [2021-11-12 22:24:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 272 states have (on average 1.2389705882352942) internal successors, (337), 273 states have internal predecessors, (337), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:24:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 343 transitions. [2021-11-12 22:24:02,391 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 343 transitions. Word has length 44 [2021-11-12 22:24:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:02,391 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 343 transitions. [2021-11-12 22:24:02,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:24:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 343 transitions. [2021-11-12 22:24:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 22:24:02,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:02,394 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] [2021-11-12 22:24:02,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:02,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:02,607 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:02,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash -440515753, now seen corresponding path program 1 times [2021-11-12 22:24:02,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:02,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068567722] [2021-11-12 22:24:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:02,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:02,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:02,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:02,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:24:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:02,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:24:02,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:02,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:24:02,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:24:02,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:24:02,966 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-12 22:24:02,967 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 22:24:03,049 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 22:24:03,049 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 22:24:03,184 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 22:24:03,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:03,356 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 22:24:03,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:03,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068567722] [2021-11-12 22:24:03,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068567722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:03,357 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:03,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:24:03,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249730491] [2021-11-12 22:24:03,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:03,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:24:03,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:03,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:24:03,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:24:03,361 INFO L87 Difference]: Start difference. First operand 278 states and 343 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 22:24:07,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:12,151 INFO L93 Difference]: Finished difference Result 561 states and 672 transitions. [2021-11-12 22:24:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:24:12,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-12 22:24:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:12,156 INFO L225 Difference]: With dead ends: 561 [2021-11-12 22:24:12,156 INFO L226 Difference]: Without dead ends: 418 [2021-11-12 22:24:12,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 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 22:24:12,158 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 187 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8415.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.91ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8701.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:12,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 908 Invalid, 246 Unknown, 0 Unchecked, 5.91ms Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 8701.57ms Time] [2021-11-12 22:24:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-12 22:24:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 277. [2021-11-12 22:24:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 271 states have (on average 1.2361623616236161) internal successors, (335), 272 states have internal predecessors, (335), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:24:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 341 transitions. [2021-11-12 22:24:12,174 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 341 transitions. Word has length 44 [2021-11-12 22:24:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:12,174 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 341 transitions. [2021-11-12 22:24:12,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 22:24:12,175 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 341 transitions. [2021-11-12 22:24:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 22:24:12,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:12,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:12,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 22:24:12,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:12,394 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:12,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:12,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1692574547, now seen corresponding path program 1 times [2021-11-12 22:24:12,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:12,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144754735] [2021-11-12 22:24:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:12,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:12,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:12,404 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:12,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:24:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:12,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:24:12,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:24:12,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:24:13,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:13,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144754735] [2021-11-12 22:24:13,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144754735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:13,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:13,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:24:13,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712656207] [2021-11-12 22:24:13,142 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:13,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:24:13,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:13,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:24:13,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:24:13,143 INFO L87 Difference]: Start difference. First operand 277 states and 341 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:24:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:13,293 INFO L93 Difference]: Finished difference Result 553 states and 687 transitions. [2021-11-12 22:24:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 77 [2021-11-12 22:24:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:13,296 INFO L225 Difference]: With dead ends: 553 [2021-11-12 22:24:13,296 INFO L226 Difference]: Without dead ends: 285 [2021-11-12 22:24:13,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 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 22:24:13,298 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 196 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:13,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 415 Invalid, 69 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 119.15ms Time] [2021-11-12 22:24:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-12 22:24:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2021-11-12 22:24:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.1732851985559567) internal successors, (325), 278 states have internal predecessors, (325), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:24:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 331 transitions. [2021-11-12 22:24:13,315 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 331 transitions. Word has length 77 [2021-11-12 22:24:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:13,315 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 331 transitions. [2021-11-12 22:24:13,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:24:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 331 transitions. [2021-11-12 22:24:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 22:24:13,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:13,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:13,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:13,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:13,536 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash -681144927, now seen corresponding path program 1 times [2021-11-12 22:24:13,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:13,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80502671] [2021-11-12 22:24:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:13,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:13,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:13,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:13,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:24:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:13,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:24:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:14,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:24:14,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:14,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80502671] [2021-11-12 22:24:14,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80502671] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:24:14,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:24:14,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:24:14,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196547140] [2021-11-12 22:24:14,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:14,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:24:14,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:24:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:24:14,251 INFO L87 Difference]: Start difference. First operand 283 states and 331 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:24:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:14,311 INFO L93 Difference]: Finished difference Result 524 states and 619 transitions. [2021-11-12 22:24:14,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:14,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 77 [2021-11-12 22:24:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:14,316 INFO L225 Difference]: With dead ends: 524 [2021-11-12 22:24:14,316 INFO L226 Difference]: Without dead ends: 286 [2021-11-12 22:24:14,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:24:14,318 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 2 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:14,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 617 Invalid, 13 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 35.04ms Time] [2021-11-12 22:24:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-12 22:24:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2021-11-12 22:24:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 279 states have (on average 1.1756272401433692) internal successors, (328), 281 states have internal predecessors, (328), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 22:24:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 335 transitions. [2021-11-12 22:24:14,333 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 335 transitions. Word has length 77 [2021-11-12 22:24:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:14,333 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 335 transitions. [2021-11-12 22:24:14,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:24:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 335 transitions. [2021-11-12 22:24:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-12 22:24:14,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:14,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:14,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:14,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:14,561 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:14,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1427472577, now seen corresponding path program 1 times [2021-11-12 22:24:14,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:14,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428049366] [2021-11-12 22:24:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:14,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:14,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:14,565 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:14,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:24:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:14,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:24:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:24:15,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:24:15,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:15,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428049366] [2021-11-12 22:24:15,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428049366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:15,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [524614995] [2021-11-12 22:24:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:15,319 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:15,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:24:15,320 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:24:15,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:24:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:24:15,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:24:15,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:24:16,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [524614995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:16,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522922781] [2021-11-12 22:24:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:16,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:16,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:16,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:24:16,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 22:24:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:16,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:24:16,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:16,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:24:16,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:24:16,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:24:16,535 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-12 22:24:16,536 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 22:24:16,633 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 22:24:16,633 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 22:24:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:24:16,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:24:16,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522922781] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:16,881 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:24:16,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-12 22:24:16,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797821531] [2021-11-12 22:24:16,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:16,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:24:16,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:16,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:24:16,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:24:16,883 INFO L87 Difference]: Start difference. First operand 286 states and 335 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:24:20,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:22,692 INFO L93 Difference]: Finished difference Result 427 states and 498 transitions. [2021-11-12 22:24:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:24:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 79 [2021-11-12 22:24:22,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:22,696 INFO L225 Difference]: With dead ends: 427 [2021-11-12 22:24:22,696 INFO L226 Difference]: Without dead ends: 423 [2021-11-12 22:24:22,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:24:22,702 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 287 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5520.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5709.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:22,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 782 Invalid, 158 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 5709.36ms Time] [2021-11-12 22:24:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-12 22:24:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 288. [2021-11-12 22:24:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 281 states have (on average 1.1743772241992882) internal successors, (330), 283 states have internal predecessors, (330), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 22:24:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 337 transitions. [2021-11-12 22:24:22,730 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 337 transitions. Word has length 79 [2021-11-12 22:24:22,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:22,731 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 337 transitions. [2021-11-12 22:24:22,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:24:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 337 transitions. [2021-11-12 22:24:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:24:22,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:22,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:22,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 22:24:22,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:23,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:23,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:23,350 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1770376997, now seen corresponding path program 1 times [2021-11-12 22:24:23,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:23,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519278226] [2021-11-12 22:24:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:23,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:23,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:23,354 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:23,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:24:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:24:23,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:24:23,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:24:24,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:24,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519278226] [2021-11-12 22:24:24,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519278226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:24,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [469408164] [2021-11-12 22:24:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:24,220 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:24,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:24:24,221 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:24:24,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:24:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:24,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:24:24,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:24:24,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:24:25,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [469408164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:25,277 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:24:25,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-12 22:24:25,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853954732] [2021-11-12 22:24:25,277 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:25,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:24:25,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:25,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:24:25,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:24:25,279 INFO L87 Difference]: Start difference. First operand 288 states and 337 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:24:27,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:29,352 INFO L93 Difference]: Finished difference Result 613 states and 722 transitions. [2021-11-12 22:24:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 113 [2021-11-12 22:24:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:29,358 INFO L225 Difference]: With dead ends: 613 [2021-11-12 22:24:29,358 INFO L226 Difference]: Without dead ends: 370 [2021-11-12 22:24:29,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:24:29,360 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 379 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3917.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4032.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:29,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 343 Invalid, 84 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 1 Unknown, 0 Unchecked, 4032.28ms Time] [2021-11-12 22:24:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-12 22:24:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 363. [2021-11-12 22:24:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 356 states have (on average 1.1797752808988764) internal successors, (420), 358 states have internal predecessors, (420), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 22:24:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 427 transitions. [2021-11-12 22:24:29,379 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 427 transitions. Word has length 113 [2021-11-12 22:24:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:29,380 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 427 transitions. [2021-11-12 22:24:29,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:24:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 427 transitions. [2021-11-12 22:24:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:24:29,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:29,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:29,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:29,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 22:24:29,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:29,786 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:29,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2065893013, now seen corresponding path program 1 times [2021-11-12 22:24:29,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:29,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618781731] [2021-11-12 22:24:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:29,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:29,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:29,788 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:29,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:24:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:24:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:24:30,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:24:30,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:30,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618781731] [2021-11-12 22:24:30,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618781731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:30,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1782541926] [2021-11-12 22:24:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:30,644 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:30,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:24:30,644 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:24:30,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:24:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:24:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:24:31,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:24:31,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1782541926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:31,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309581577] [2021-11-12 22:24:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:31,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:31,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:31,443 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:24:31,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 22:24:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:31,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:24:31,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:24:31,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:24:32,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309581577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:32,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:24:32,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-12 22:24:32,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814442599] [2021-11-12 22:24:32,168 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:24:32,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:24:32,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:32,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:24:32,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:24:32,169 INFO L87 Difference]: Start difference. First operand 363 states and 427 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 22:24:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:32,634 INFO L93 Difference]: Finished difference Result 693 states and 827 transitions. [2021-11-12 22:24:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:24:32,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 120 [2021-11-12 22:24:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:32,638 INFO L225 Difference]: With dead ends: 693 [2021-11-12 22:24:32,638 INFO L226 Difference]: Without dead ends: 378 [2021-11-12 22:24:32,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:24:32,640 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 45 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:32,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1220 Invalid, 96 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [27 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 197.41ms Time] [2021-11-12 22:24:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-12 22:24:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 374. [2021-11-12 22:24:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 366 states have (on average 1.1967213114754098) internal successors, (438), 368 states have internal predecessors, (438), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 22:24:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 445 transitions. [2021-11-12 22:24:32,660 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 445 transitions. Word has length 120 [2021-11-12 22:24:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:32,660 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 445 transitions. [2021-11-12 22:24:32,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 22:24:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 445 transitions. [2021-11-12 22:24:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:24:32,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:32,663 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:32,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:32,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:33,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 22:24:33,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:33,277 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:33,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1133250829, now seen corresponding path program 2 times [2021-11-12 22:24:33,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:33,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950987407] [2021-11-12 22:24:33,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:24:33,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:33,279 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:33,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:24:33,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:24:33,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:24:33,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:24:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:24:33,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:24:34,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:34,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950987407] [2021-11-12 22:24:34,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950987407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:34,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1252328573] [2021-11-12 22:24:34,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:24:34,483 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:34,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:24:34,484 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:24:34,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:24:35,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:24:35,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:24:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:24:35,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:24:35,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:24:35,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1252328573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:35,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180444420] [2021-11-12 22:24:35,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:24:35,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:35,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:35,722 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:24:35,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 22:24:36,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:24:36,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:24:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:24:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:24:36,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:24:37,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180444420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:37,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:24:37,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-12 22:24:37,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608182296] [2021-11-12 22:24:37,023 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:24:37,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:24:37,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:24:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:24:37,026 INFO L87 Difference]: Start difference. First operand 374 states and 445 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:24:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:38,085 INFO L93 Difference]: Finished difference Result 711 states and 852 transitions. [2021-11-12 22:24:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 22:24:38,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-11-12 22:24:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:38,090 INFO L225 Difference]: With dead ends: 711 [2021-11-12 22:24:38,090 INFO L226 Difference]: Without dead ends: 387 [2021-11-12 22:24:38,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 22:24:38,092 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 69 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 373.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.39ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 442.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:38,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1458 Invalid, 259 Unknown, 0 Unchecked, 4.39ms Time], IncrementalHoareTripleChecker [40 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 442.79ms Time] [2021-11-12 22:24:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-12 22:24:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 381. [2021-11-12 22:24:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 373 states have (on average 1.193029490616622) internal successors, (445), 375 states have internal predecessors, (445), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 22:24:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 452 transitions. [2021-11-12 22:24:38,115 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 452 transitions. Word has length 126 [2021-11-12 22:24:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:38,116 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 452 transitions. [2021-11-12 22:24:38,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:24:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 452 transitions. [2021-11-12 22:24:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 22:24:38,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:38,119 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:38,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:38,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-12 22:24:38,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:38,740 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash 713499125, now seen corresponding path program 3 times [2021-11-12 22:24:38,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:38,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255626216] [2021-11-12 22:24:38,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:24:38,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:38,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:38,744 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:38,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:24:41,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 22:24:41,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:24:41,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:24:41,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:24:41,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:24:42,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:42,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255626216] [2021-11-12 22:24:42,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255626216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:42,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1201468582] [2021-11-12 22:24:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:24:42,153 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:42,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:24:42,153 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:24:42,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:25:22,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 22:25:22,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:22,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:25:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:25:23,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:25:23,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1201468582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:23,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254333579] [2021-11-12 22:25:23,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:25:23,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:23,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:23,382 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:23,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6027b93d-baad-4f3c-80ee-188eb36701c0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process