./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:01:45,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:01:45,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:01:45,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:01:45,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:01:45,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:01:45,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:01:45,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:01:45,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:01:45,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:01:45,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:01:45,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:01:45,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:01:45,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:01:45,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:01:45,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:01:45,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:01:45,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:01:45,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:01:45,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:01:45,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:01:45,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:01:45,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:01:45,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:01:45,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:01:45,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:01:45,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:01:45,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:01:45,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:01:45,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:01:45,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:01:45,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:01:45,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:01:45,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:01:45,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:01:45,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:01:45,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:01:45,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:01:45,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:01:45,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:01:45,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:01:45,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-19 14:01:45,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:01:45,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:01:45,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:01:45,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:01:45,629 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:01:45,629 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:01:45,629 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:01:45,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:01:45,630 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:01:45,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:01:45,631 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:01:45,631 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:01:45,632 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:01:45,632 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:01:45,632 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:01:45,632 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:01:45,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 14:01:45,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 14:01:45,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:01:45,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:01:45,634 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 14:01:45,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:01:45,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:01:45,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:01:45,635 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 14:01:45,635 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 14:01:45,637 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 14:01:45,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:01:45,637 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:01:45,637 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:01:45,638 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:01:45,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:01:45,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:01:45,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:45,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:01:45,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:01:45,639 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:01:45,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:01:45,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:01:45,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:01:45,640 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f [2021-11-19 14:01:45,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:01:45,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:01:45,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:01:45,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:01:45,946 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:01:45,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-19 14:01:46,019 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data/26b0ac35f/1b504c03a36d49f3a7122cde406aaeaf/FLAG1be98ae51 [2021-11-19 14:01:46,809 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:01:46,810 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-19 14:01:46,847 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data/26b0ac35f/1b504c03a36d49f3a7122cde406aaeaf/FLAG1be98ae51 [2021-11-19 14:01:46,948 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data/26b0ac35f/1b504c03a36d49f3a7122cde406aaeaf [2021-11-19 14:01:46,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:01:46,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:01:46,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:46,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:01:46,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:01:46,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:46" (1/1) ... [2021-11-19 14:01:46,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b871a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:46, skipping insertion in model container [2021-11-19 14:01:46,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:46" (1/1) ... [2021-11-19 14:01:46,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:01:47,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:01:47,652 WARN L230 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-19 14:01:47,841 WARN L230 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-19 14:01:47,864 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:47,876 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) [2021-11-19 14:01:47,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1cedd7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:47, skipping insertion in model container [2021-11-19 14:01:47,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:47,877 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:01:47,879 INFO L158 Benchmark]: Toolchain (without parser) took 925.40ms. Allocated memory is still 96.5MB. Free memory was 56.8MB in the beginning and 62.4MB in the end (delta: -5.7MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-19 14:01:47,880 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory is still 75.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:01:47,882 INFO L158 Benchmark]: CACSL2BoogieTranslator took 920.31ms. Allocated memory is still 96.5MB. Free memory was 56.6MB in the beginning and 62.4MB in the end (delta: -5.8MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-19 14:01:47,884 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory is still 75.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 920.31ms. Allocated memory is still 96.5MB. Free memory was 56.6MB in the beginning and 62.4MB in the end (delta: -5.8MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 736]: 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:01:50,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:01:50,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:01:50,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:01:50,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:01:50,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:01:50,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:01:50,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:01:50,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:01:50,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:01:50,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:01:50,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:01:50,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:01:50,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:01:50,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:01:50,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:01:50,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:01:50,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:01:50,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:01:50,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:01:50,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:01:50,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:01:50,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:01:50,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:01:50,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:01:50,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:01:50,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:01:50,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:01:50,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:01:50,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:01:50,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:01:50,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:01:50,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:01:50,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:01:50,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:01:50,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:01:50,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:01:50,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:01:50,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:01:50,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:01:50,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:01:50,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-19 14:01:50,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:01:50,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:01:50,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:01:50,568 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:01:50,568 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:01:50,568 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:01:50,569 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:01:50,569 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:01:50,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:01:50,569 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:01:50,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 14:01:50,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 14:01:50,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:01:50,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:01:50,572 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 14:01:50,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:01:50,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:01:50,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:01:50,573 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 14:01:50,574 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 14:01:50,574 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 14:01:50,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:01:50,574 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:01:50,574 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:01:50,575 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:01:50,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:01:50,575 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:01:50,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:01:50,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:01:50,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:01:50,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:50,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:01:50,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:01:50,577 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:01:50,577 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:50,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:01:50,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:01:50,578 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f [2021-11-19 14:01:50,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:01:50,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:01:50,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:01:50,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:01:50,956 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:01:50,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-19 14:01:51,034 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data/e39c6c345/95e2446a783845ab87b7348b82dfc6d0/FLAGdf3831d50 [2021-11-19 14:01:51,880 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:01:51,880 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-19 14:01:51,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data/e39c6c345/95e2446a783845ab87b7348b82dfc6d0/FLAGdf3831d50 [2021-11-19 14:01:52,054 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/data/e39c6c345/95e2446a783845ab87b7348b82dfc6d0 [2021-11-19 14:01:52,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:01:52,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:01:52,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:52,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:01:52,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:01:52,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:52" (1/1) ... [2021-11-19 14:01:52,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30cbe27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:52, skipping insertion in model container [2021-11-19 14:01:52,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:52" (1/1) ... [2021-11-19 14:01:52,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:01:52,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:01:52,656 WARN L230 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-19 14:01:52,822 WARN L230 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-19 14:01:52,843 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:52,856 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:01:52,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:01:52,903 WARN L230 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-19 14:01:52,994 WARN L230 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-19 14:01:53,007 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:53,013 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:01:53,044 WARN L230 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-19 14:01:53,121 WARN L230 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_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-19 14:01:53,144 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:53,188 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:01:53,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53 WrapperNode [2021-11-19 14:01:53,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:53,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:01:53,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:01:53,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:01:53,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,317 INFO L137 Inliner]: procedures = 180, calls = 336, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1205 [2021-11-19 14:01:53,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:01:53,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:01:53,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:01:53,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:01:53,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:01:53,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:01:53,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:01:53,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:01:53,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (1/1) ... [2021-11-19 14:01:53,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:53,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:53,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:01:53,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:01:53,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:01:53,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:01:53,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:01:53,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:01:53,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:01:53,632 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:01:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:01:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:01:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:01:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:01:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:01:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:01:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:01:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:01:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:01:53,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:01:53,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:01:53,967 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:01:53,969 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:01:53,973 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:02:00,408 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:02:00,436 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:02:00,439 INFO L301 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-19 14:02:00,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:02:00 BoogieIcfgContainer [2021-11-19 14:02:00,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:02:00,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:02:00,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:02:00,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:02:00,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:01:52" (1/3) ... [2021-11-19 14:02:00,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fefb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:02:00, skipping insertion in model container [2021-11-19 14:02:00,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:53" (2/3) ... [2021-11-19 14:02:00,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fefb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:02:00, skipping insertion in model container [2021-11-19 14:02:00,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:02:00" (3/3) ... [2021-11-19 14:02:00,458 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test3-2.i [2021-11-19 14:02:00,464 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:02:00,465 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 639 error locations. [2021-11-19 14:02:00,528 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:02:00,534 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:02:00,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 639 error locations. [2021-11-19 14:02:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 1271 states, 624 states have (on average 2.2580128205128207) internal successors, (1409), 1265 states have internal predecessors, (1409), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-19 14:02:00,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:00,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-19 14:02:00,596 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2021-11-19 14:02:00,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:00,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963340279] [2021-11-19 14:02:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:00,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:00,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:00,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:00,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:02:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:00,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:00,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:01,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:02:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:01,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:01,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:01,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963340279] [2021-11-19 14:02:01,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963340279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:01,071 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:01,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:02:01,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690096752] [2021-11-19 14:02:01,074 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:01,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:02:01,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:02:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:02:01,148 INFO L87 Difference]: Start difference. First operand has 1271 states, 624 states have (on average 2.2580128205128207) internal successors, (1409), 1265 states have internal predecessors, (1409), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:03,825 INFO L93 Difference]: Finished difference Result 1443 states and 1528 transitions. [2021-11-19 14:02:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:03,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-19 14:02:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:03,859 INFO L225 Difference]: With dead ends: 1443 [2021-11-19 14:02:03,859 INFO L226 Difference]: Without dead ends: 1441 [2021-11-19 14:02:03,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:02:03,866 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 1181 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:03,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 928 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 14:02:03,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-11-19 14:02:03,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1256. [2021-11-19 14:02:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 624 states have (on average 2.110576923076923) internal successors, (1317), 1250 states have internal predecessors, (1317), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1333 transitions. [2021-11-19 14:02:03,996 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1333 transitions. Word has length 3 [2021-11-19 14:02:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:03,996 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1333 transitions. [2021-11-19 14:02:03,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1333 transitions. [2021-11-19 14:02:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-19 14:02:03,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:03,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-19 14:02:04,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:04,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:04,213 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:04,214 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2021-11-19 14:02:04,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:04,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588224788] [2021-11-19 14:02:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:04,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:04,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:04,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:04,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:02:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:04,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:02:04,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:04,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:02:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:04,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:04,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:04,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588224788] [2021-11-19 14:02:04,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588224788] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:04,466 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:04,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 14:02:04,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297991224] [2021-11-19 14:02:04,467 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:04,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:02:04,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:02:04,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:04,469 INFO L87 Difference]: Start difference. First operand 1256 states and 1333 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:10,186 INFO L93 Difference]: Finished difference Result 1940 states and 2071 transitions. [2021-11-19 14:02:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:02:10,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-19 14:02:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:10,200 INFO L225 Difference]: With dead ends: 1940 [2021-11-19 14:02:10,201 INFO L226 Difference]: Without dead ends: 1940 [2021-11-19 14:02:10,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:10,203 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 2237 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2247 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:10,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2247 Valid, 1647 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-19 14:02:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-11-19 14:02:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1291. [2021-11-19 14:02:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 668 states have (on average 2.089820359281437) internal successors, (1396), 1285 states have internal predecessors, (1396), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1412 transitions. [2021-11-19 14:02:10,254 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1412 transitions. Word has length 3 [2021-11-19 14:02:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:10,254 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 1412 transitions. [2021-11-19 14:02:10,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1412 transitions. [2021-11-19 14:02:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:02:10,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:10,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:10,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:10,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:10,462 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2021-11-19 14:02:10,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:10,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018946467] [2021-11-19 14:02:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:10,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:10,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:10,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:10,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:02:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:10,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:10,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:02:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:10,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:10,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:10,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018946467] [2021-11-19 14:02:10,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018946467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:10,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:10,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:02:10,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891830091] [2021-11-19 14:02:10,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:10,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:02:10,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:10,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:02:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:02:10,691 INFO L87 Difference]: Start difference. First operand 1291 states and 1412 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:13,208 INFO L93 Difference]: Finished difference Result 1619 states and 1765 transitions. [2021-11-19 14:02:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 14:02:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:13,222 INFO L225 Difference]: With dead ends: 1619 [2021-11-19 14:02:13,222 INFO L226 Difference]: Without dead ends: 1619 [2021-11-19 14:02:13,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:02:13,224 INFO L933 BasicCegarLoop]: 1165 mSDtfsCounter, 992 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:13,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 1512 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 14:02:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-11-19 14:02:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1242. [2021-11-19 14:02:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 668 states have (on average 2.0119760479041915) internal successors, (1344), 1236 states have internal predecessors, (1344), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1360 transitions. [2021-11-19 14:02:13,267 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1360 transitions. Word has length 8 [2021-11-19 14:02:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:13,268 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 1360 transitions. [2021-11-19 14:02:13,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:13,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1360 transitions. [2021-11-19 14:02:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:02:13,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:13,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:13,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:13,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:13,485 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2021-11-19 14:02:13,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:13,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932269172] [2021-11-19 14:02:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:13,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:13,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:13,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:13,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:02:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:13,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:02:13,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:13,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:02:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:13,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:13,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:13,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932269172] [2021-11-19 14:02:13,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932269172] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:13,805 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:13,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 14:02:13,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685292742] [2021-11-19 14:02:13,806 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:13,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:02:13,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:13,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:02:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:13,807 INFO L87 Difference]: Start difference. First operand 1242 states and 1360 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:19,468 INFO L93 Difference]: Finished difference Result 1662 states and 1772 transitions. [2021-11-19 14:02:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:02:19,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 14:02:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:19,485 INFO L225 Difference]: With dead ends: 1662 [2021-11-19 14:02:19,486 INFO L226 Difference]: Without dead ends: 1662 [2021-11-19 14:02:19,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:19,491 INFO L933 BasicCegarLoop]: 1338 mSDtfsCounter, 733 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2373 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:19,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2373 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-19 14:02:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-11-19 14:02:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1232. [2021-11-19 14:02:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 668 states have (on average 1.9925149700598803) internal successors, (1331), 1226 states have internal predecessors, (1331), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1347 transitions. [2021-11-19 14:02:19,543 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1347 transitions. Word has length 8 [2021-11-19 14:02:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:19,543 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1347 transitions. [2021-11-19 14:02:19,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1347 transitions. [2021-11-19 14:02:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 14:02:19,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:19,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:19,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:19,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:19,756 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr526REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash 871377621, now seen corresponding path program 1 times [2021-11-19 14:02:19,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:19,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250506805] [2021-11-19 14:02:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:19,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:19,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:19,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:19,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:02:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:02:19,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:20,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:20,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:20,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250506805] [2021-11-19 14:02:20,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250506805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:20,091 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:20,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 14:02:20,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560939447] [2021-11-19 14:02:20,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:20,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:02:20,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:20,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:02:20,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:20,093 INFO L87 Difference]: Start difference. First operand 1232 states and 1347 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:21,109 INFO L93 Difference]: Finished difference Result 1874 states and 2031 transitions. [2021-11-19 14:02:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:02:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-19 14:02:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:21,118 INFO L225 Difference]: With dead ends: 1874 [2021-11-19 14:02:21,118 INFO L226 Difference]: Without dead ends: 1874 [2021-11-19 14:02:21,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:02:21,120 INFO L933 BasicCegarLoop]: 1394 mSDtfsCounter, 753 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 3745 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:21,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 3745 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:02:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-19 14:02:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1472. [2021-11-19 14:02:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 908 states have (on average 1.9658590308370043) internal successors, (1785), 1466 states have internal predecessors, (1785), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 1801 transitions. [2021-11-19 14:02:21,171 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 1801 transitions. Word has length 11 [2021-11-19 14:02:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:21,172 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 1801 transitions. [2021-11-19 14:02:21,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 1801 transitions. [2021-11-19 14:02:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 14:02:21,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:21,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:21,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:21,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:21,388 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash -702153283, now seen corresponding path program 1 times [2021-11-19 14:02:21,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:21,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191413380] [2021-11-19 14:02:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:21,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:21,390 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:21,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:02:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:21,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:21,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:21,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:21,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:21,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191413380] [2021-11-19 14:02:21,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191413380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:21,596 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:21,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:02:21,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383145796] [2021-11-19 14:02:21,597 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:21,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:02:21,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:02:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:21,598 INFO L87 Difference]: Start difference. First operand 1472 states and 1801 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:21,642 INFO L93 Difference]: Finished difference Result 1653 states and 1979 transitions. [2021-11-19 14:02:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:21,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-19 14:02:21,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:21,650 INFO L225 Difference]: With dead ends: 1653 [2021-11-19 14:02:21,650 INFO L226 Difference]: Without dead ends: 1653 [2021-11-19 14:02:21,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:21,651 INFO L933 BasicCegarLoop]: 1223 mSDtfsCounter, 602 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 2929 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:21,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 2929 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:02:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-11-19 14:02:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1412. [2021-11-19 14:02:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 872 states have (on average 1.948394495412844) internal successors, (1699), 1406 states have internal predecessors, (1699), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1715 transitions. [2021-11-19 14:02:21,689 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1715 transitions. Word has length 13 [2021-11-19 14:02:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:21,689 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 1715 transitions. [2021-11-19 14:02:21,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1715 transitions. [2021-11-19 14:02:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 14:02:21,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:21,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:21,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:21,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:21,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr364REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash -459414345, now seen corresponding path program 1 times [2021-11-19 14:02:21,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:21,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917240097] [2021-11-19 14:02:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:21,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:21,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:21,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:21,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:02:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:22,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:02:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:22,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:22,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:22,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917240097] [2021-11-19 14:02:22,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917240097] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:22,124 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:22,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:02:22,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741233070] [2021-11-19 14:02:22,124 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:22,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:02:22,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:02:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:02:22,126 INFO L87 Difference]: Start difference. First operand 1412 states and 1715 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:22,221 INFO L93 Difference]: Finished difference Result 1625 states and 1923 transitions. [2021-11-19 14:02:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:02:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15 [2021-11-19 14:02:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:22,231 INFO L225 Difference]: With dead ends: 1625 [2021-11-19 14:02:22,231 INFO L226 Difference]: Without dead ends: 1625 [2021-11-19 14:02:22,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:02:22,232 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 573 mSDsluCounter, 2877 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 4055 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:22,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 4055 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:02:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-11-19 14:02:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1382. [2021-11-19 14:02:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1382 states, 856 states have (on average 1.9170560747663552) internal successors, (1641), 1376 states have internal predecessors, (1641), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 1657 transitions. [2021-11-19 14:02:22,269 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 1657 transitions. Word has length 15 [2021-11-19 14:02:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:22,270 INFO L470 AbstractCegarLoop]: Abstraction has 1382 states and 1657 transitions. [2021-11-19 14:02:22,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 1657 transitions. [2021-11-19 14:02:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 14:02:22,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:22,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:22,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:22,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:22,484 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr637ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:22,485 INFO L85 PathProgramCache]: Analyzing trace with hash 552252916, now seen corresponding path program 1 times [2021-11-19 14:02:22,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:22,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513364111] [2021-11-19 14:02:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:22,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:22,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:22,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:22,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:02:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:02:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:22,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:02:22,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:02:22,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:02:22,711 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 14:02:22,711 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 [2021-11-19 14:02:22,798 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 14:02:22,799 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 [2021-11-19 14:02:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:22,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:22,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:22,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513364111] [2021-11-19 14:02:22,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513364111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:22,926 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:22,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:02:22,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512133804] [2021-11-19 14:02:22,927 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:22,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:02:22,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:22,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:02:22,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:02:22,928 INFO L87 Difference]: Start difference. First operand 1382 states and 1657 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:25,239 INFO L93 Difference]: Finished difference Result 1836 states and 2181 transitions. [2021-11-19 14:02:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:02:25,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-19 14:02:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:25,248 INFO L225 Difference]: With dead ends: 1836 [2021-11-19 14:02:25,248 INFO L226 Difference]: Without dead ends: 1836 [2021-11-19 14:02:25,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:02:25,249 INFO L933 BasicCegarLoop]: 1145 mSDtfsCounter, 443 mSDsluCounter, 4332 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:25,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 5477 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:02:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-11-19 14:02:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1381. [2021-11-19 14:02:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 855 states have (on average 1.9169590643274854) internal successors, (1639), 1375 states have internal predecessors, (1639), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1655 transitions. [2021-11-19 14:02:25,292 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1655 transitions. Word has length 16 [2021-11-19 14:02:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:25,292 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 1655 transitions. [2021-11-19 14:02:25,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1655 transitions. [2021-11-19 14:02:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 14:02:25,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:25,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:25,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:25,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:25,508 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:25,508 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2021-11-19 14:02:25,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:25,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484505101] [2021-11-19 14:02:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:25,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:25,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:25,512 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:25,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:02:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:25,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:25,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:25,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484505101] [2021-11-19 14:02:25,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484505101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:25,759 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:25,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:02:25,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459902061] [2021-11-19 14:02:25,759 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:25,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:02:25,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:02:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:25,762 INFO L87 Difference]: Start difference. First operand 1381 states and 1655 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:25,817 INFO L93 Difference]: Finished difference Result 1321 states and 1569 transitions. [2021-11-19 14:02:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:25,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-19 14:02:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:25,825 INFO L225 Difference]: With dead ends: 1321 [2021-11-19 14:02:25,826 INFO L226 Difference]: Without dead ends: 1321 [2021-11-19 14:02:25,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:25,829 INFO L933 BasicCegarLoop]: 1139 mSDtfsCounter, 2216 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2224 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:25,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2224 Valid, 1171 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:02:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-11-19 14:02:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1321. [2021-11-19 14:02:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 819 states have (on average 1.8962148962148961) internal successors, (1553), 1315 states have internal predecessors, (1553), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1569 transitions. [2021-11-19 14:02:25,887 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1569 transitions. Word has length 18 [2021-11-19 14:02:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:25,888 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1569 transitions. [2021-11-19 14:02:25,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1569 transitions. [2021-11-19 14:02:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 14:02:25,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:25,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:25,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:26,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:26,091 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2021-11-19 14:02:26,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:26,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716309659] [2021-11-19 14:02:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:26,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:26,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:26,093 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:26,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:02:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:26,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:02:26,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:26,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:26,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:26,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716309659] [2021-11-19 14:02:26,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716309659] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:26,347 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:26,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:02:26,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909912050] [2021-11-19 14:02:26,348 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:26,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:02:26,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:02:26,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:02:26,349 INFO L87 Difference]: Start difference. First operand 1321 states and 1569 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:26,438 INFO L93 Difference]: Finished difference Result 1293 states and 1513 transitions. [2021-11-19 14:02:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:02:26,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-19 14:02:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:26,446 INFO L225 Difference]: With dead ends: 1293 [2021-11-19 14:02:26,447 INFO L226 Difference]: Without dead ends: 1293 [2021-11-19 14:02:26,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:02:26,448 INFO L933 BasicCegarLoop]: 1094 mSDtfsCounter, 1079 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 2245 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:26,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 2245 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:02:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-11-19 14:02:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1291. [2021-11-19 14:02:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 803 states have (on average 1.8617683686176836) internal successors, (1495), 1285 states have internal predecessors, (1495), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1511 transitions. [2021-11-19 14:02:26,477 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1511 transitions. Word has length 20 [2021-11-19 14:02:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:26,477 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 1511 transitions. [2021-11-19 14:02:26,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1511 transitions. [2021-11-19 14:02:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 14:02:26,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:26,479 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] [2021-11-19 14:02:26,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:26,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:26,698 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2021-11-19 14:02:26,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:26,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399816382] [2021-11-19 14:02:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:26,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:26,700 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:26,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:02:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:02:26,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:26,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:02:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:26,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:27,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:27,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399816382] [2021-11-19 14:02:27,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399816382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:27,106 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:27,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:02:27,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625552763] [2021-11-19 14:02:27,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:27,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:02:27,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:02:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:27,108 INFO L87 Difference]: Start difference. First operand 1291 states and 1511 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:29,857 INFO L93 Difference]: Finished difference Result 1892 states and 2245 transitions. [2021-11-19 14:02:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:02:29,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-19 14:02:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:29,865 INFO L225 Difference]: With dead ends: 1892 [2021-11-19 14:02:29,865 INFO L226 Difference]: Without dead ends: 1892 [2021-11-19 14:02:29,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:02:29,866 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 1773 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1778 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:29,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1778 Valid, 1276 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 14:02:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-11-19 14:02:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1287. [2021-11-19 14:02:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 803 states have (on average 1.8518057285180574) internal successors, (1487), 1281 states have internal predecessors, (1487), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1503 transitions. [2021-11-19 14:02:29,897 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1503 transitions. Word has length 34 [2021-11-19 14:02:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:29,898 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 1503 transitions. [2021-11-19 14:02:29,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:29,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1503 transitions. [2021-11-19 14:02:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 14:02:29,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:29,900 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] [2021-11-19 14:02:29,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-19 14:02:30,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:30,113 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2021-11-19 14:02:30,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:30,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942284298] [2021-11-19 14:02:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:30,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:30,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:30,115 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:30,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:02:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:30,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:02:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:30,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:02:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:30,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:31,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:31,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942284298] [2021-11-19 14:02:31,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942284298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:31,105 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:31,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 14:02:31,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407890187] [2021-11-19 14:02:31,106 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:31,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:02:31,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:31,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:02:31,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:02:31,108 INFO L87 Difference]: Start difference. First operand 1287 states and 1503 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:40,558 INFO L93 Difference]: Finished difference Result 2017 states and 2347 transitions. [2021-11-19 14:02:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:02:40,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-19 14:02:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:40,568 INFO L225 Difference]: With dead ends: 2017 [2021-11-19 14:02:40,569 INFO L226 Difference]: Without dead ends: 2017 [2021-11-19 14:02:40,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:02:40,570 INFO L933 BasicCegarLoop]: 1410 mSDtfsCounter, 1835 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:40,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1840 Valid, 3032 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-11-19 14:02:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-11-19 14:02:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1283. [2021-11-19 14:02:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 803 states have (on average 1.841843088418431) internal successors, (1479), 1277 states have internal predecessors, (1479), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1495 transitions. [2021-11-19 14:02:40,605 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1495 transitions. Word has length 34 [2021-11-19 14:02:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:40,605 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1495 transitions. [2021-11-19 14:02:40,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1495 transitions. [2021-11-19 14:02:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 14:02:40,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:40,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:40,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:40,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:40,822 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:40,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1509555205, now seen corresponding path program 1 times [2021-11-19 14:02:40,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:40,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375925251] [2021-11-19 14:02:40,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:40,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:40,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:40,825 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:40,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:02:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:02:41,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:41,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:41,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:41,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375925251] [2021-11-19 14:02:41,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375925251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:41,329 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:41,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 14:02:41,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394858342] [2021-11-19 14:02:41,330 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:41,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:02:41,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:02:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:41,331 INFO L87 Difference]: Start difference. First operand 1283 states and 1495 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:41,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:41,393 INFO L93 Difference]: Finished difference Result 1271 states and 1475 transitions. [2021-11-19 14:02:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:02:41,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 14:02:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:41,400 INFO L225 Difference]: With dead ends: 1271 [2021-11-19 14:02:41,400 INFO L226 Difference]: Without dead ends: 1271 [2021-11-19 14:02:41,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:02:41,402 INFO L933 BasicCegarLoop]: 1088 mSDtfsCounter, 1055 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:41,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 2191 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:02:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-11-19 14:02:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1271. [2021-11-19 14:02:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 791 states have (on average 1.8445006321112516) internal successors, (1459), 1265 states have internal predecessors, (1459), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1475 transitions. [2021-11-19 14:02:41,434 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1475 transitions. Word has length 52 [2021-11-19 14:02:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:41,435 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 1475 transitions. [2021-11-19 14:02:41,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:41,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1475 transitions. [2021-11-19 14:02:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:02:41,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:41,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:41,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:41,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:41,658 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:41,659 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2021-11-19 14:02:41,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:41,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488005095] [2021-11-19 14:02:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:41,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:41,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:41,661 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:41,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:02:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:41,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:02:41,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:42,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:02:42,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:02:42,873 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 14:02:42,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-19 14:02:42,898 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 14:02:42,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-19 14:02:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:42,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:48,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:48,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488005095] [2021-11-19 14:02:48,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488005095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:48,386 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:48,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 14:02:48,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800345805] [2021-11-19 14:02:48,387 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:48,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:02:48,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:02:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-19 14:02:48,389 INFO L87 Difference]: Start difference. First operand 1271 states and 1475 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:54,346 INFO L93 Difference]: Finished difference Result 1818 states and 2112 transitions. [2021-11-19 14:02:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:02:54,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 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 60 [2021-11-19 14:02:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:54,354 INFO L225 Difference]: With dead ends: 1818 [2021-11-19 14:02:54,354 INFO L226 Difference]: Without dead ends: 1818 [2021-11-19 14:02:54,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:02:54,355 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1516 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 2113 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1595 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:54,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 2113 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1313 Invalid, 0 Unknown, 1595 Unchecked, 5.9s Time] [2021-11-19 14:02:54,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-11-19 14:02:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1249. [2021-11-19 14:02:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 801 states have (on average 1.8039950062421972) internal successors, (1445), 1243 states have internal predecessors, (1445), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1461 transitions. [2021-11-19 14:02:54,381 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1461 transitions. Word has length 60 [2021-11-19 14:02:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:54,382 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1461 transitions. [2021-11-19 14:02:54,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1461 transitions. [2021-11-19 14:02:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 14:02:54,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:54,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:54,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:54,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:54,598 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:54,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1192602638, now seen corresponding path program 1 times [2021-11-19 14:02:54,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:54,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337326674] [2021-11-19 14:02:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:54,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:54,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:54,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:54,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:02:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:54,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:02:54,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:55,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:55,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-19 14:02:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:55,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:55,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337326674] [2021-11-19 14:02:55,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337326674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:55,545 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:55,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 14:02:55,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925490301] [2021-11-19 14:02:55,546 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:55,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:02:55,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:02:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:02:55,547 INFO L87 Difference]: Start difference. First operand 1249 states and 1461 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:58,187 INFO L93 Difference]: Finished difference Result 1247 states and 1459 transitions. [2021-11-19 14:02:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:02:58,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-19 14:02:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:58,194 INFO L225 Difference]: With dead ends: 1247 [2021-11-19 14:02:58,194 INFO L226 Difference]: Without dead ends: 1247 [2021-11-19 14:02:58,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:02:58,195 INFO L933 BasicCegarLoop]: 685 mSDtfsCounter, 812 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:58,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 1073 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 14:02:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-11-19 14:02:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1247. [2021-11-19 14:02:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 801 states have (on average 1.801498127340824) internal successors, (1443), 1241 states have internal predecessors, (1443), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:02:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1459 transitions. [2021-11-19 14:02:58,218 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1459 transitions. Word has length 62 [2021-11-19 14:02:58,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:58,219 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 1459 transitions. [2021-11-19 14:02:58,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1459 transitions. [2021-11-19 14:02:58,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 14:02:58,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:58,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:58,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 14:02:58,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:58,448 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:02:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:58,449 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2021-11-19 14:02:58,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:58,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235085975] [2021-11-19 14:02:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:58,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:58,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:58,451 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:58,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:02:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:02:58,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:58,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:02:58,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-19 14:02:58,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-19 14:02:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:58,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:58,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:58,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235085975] [2021-11-19 14:02:58,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235085975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:58,995 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:58,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 14:02:58,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411430296] [2021-11-19 14:02:58,995 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:58,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:02:58,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:02:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:02:58,996 INFO L87 Difference]: Start difference. First operand 1247 states and 1459 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 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) [2021-11-19 14:03:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:02,664 INFO L93 Difference]: Finished difference Result 1246 states and 1458 transitions. [2021-11-19 14:03:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:03:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 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 65 [2021-11-19 14:03:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:02,672 INFO L225 Difference]: With dead ends: 1246 [2021-11-19 14:03:02,672 INFO L226 Difference]: Without dead ends: 1246 [2021-11-19 14:03:02,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:03:02,673 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 4 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:02,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2704 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 14:03:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-11-19 14:03:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1246. [2021-11-19 14:03:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 801 states have (on average 1.8002496878901373) internal successors, (1442), 1240 states have internal predecessors, (1442), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:03:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1458 transitions. [2021-11-19 14:03:02,710 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1458 transitions. Word has length 65 [2021-11-19 14:03:02,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:02,710 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 1458 transitions. [2021-11-19 14:03:02,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 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) [2021-11-19 14:03:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1458 transitions. [2021-11-19 14:03:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 14:03:02,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:02,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:02,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:02,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:02,926 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:03:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:02,927 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2021-11-19 14:03:02,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:02,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142446159] [2021-11-19 14:03:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:02,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:02,930 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:02,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:03:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:03,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:03:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:03,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:03:03,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-19 14:03:03,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 14:03:03,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-19 14:03:03,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-19 14:03:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:03,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:03,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:03,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142446159] [2021-11-19 14:03:03,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142446159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:03,920 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:03,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-19 14:03:03,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005589529] [2021-11-19 14:03:03,921 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:03,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:03:03,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:03:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:03:03,922 INFO L87 Difference]: Start difference. First operand 1246 states and 1458 transitions. Second operand has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:03:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:13,763 INFO L93 Difference]: Finished difference Result 1245 states and 1457 transitions. [2021-11-19 14:03:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:03:13,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-19 14:03:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:13,771 INFO L225 Difference]: With dead ends: 1245 [2021-11-19 14:03:13,771 INFO L226 Difference]: Without dead ends: 1245 [2021-11-19 14:03:13,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:03:13,773 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 4 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3314 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:13,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3314 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-11-19 14:03:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-11-19 14:03:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1245. [2021-11-19 14:03:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 800 states have (on average 1.80125) internal successors, (1441), 1239 states have internal predecessors, (1441), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:03:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1457 transitions. [2021-11-19 14:03:13,801 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1457 transitions. Word has length 65 [2021-11-19 14:03:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:13,802 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 1457 transitions. [2021-11-19 14:03:13,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:03:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1457 transitions. [2021-11-19 14:03:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 14:03:13,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:13,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:13,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 14:03:14,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:14,021 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:03:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash 231575279, now seen corresponding path program 1 times [2021-11-19 14:03:14,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:14,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328886443] [2021-11-19 14:03:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:14,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:14,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:14,024 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:14,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:03:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:14,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:03:14,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:14,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:14,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:14,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328886443] [2021-11-19 14:03:14,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328886443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:14,785 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:14,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:03:14,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094926682] [2021-11-19 14:03:14,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:14,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:03:14,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:14,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:03:14,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:03:14,788 INFO L87 Difference]: Start difference. First operand 1245 states and 1457 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:03:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:14,927 INFO L93 Difference]: Finished difference Result 1255 states and 1470 transitions. [2021-11-19 14:03:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:03:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2021-11-19 14:03:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:14,944 INFO L225 Difference]: With dead ends: 1255 [2021-11-19 14:03:14,951 INFO L226 Difference]: Without dead ends: 1255 [2021-11-19 14:03:14,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:03:14,952 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 11 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3150 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:14,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3150 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-11-19 14:03:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1255. [2021-11-19 14:03:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 808 states have (on average 1.7982673267326732) internal successors, (1453), 1248 states have internal predecessors, (1453), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:03:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1470 transitions. [2021-11-19 14:03:14,997 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1470 transitions. Word has length 73 [2021-11-19 14:03:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:14,998 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 1470 transitions. [2021-11-19 14:03:14,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:03:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1470 transitions. [2021-11-19 14:03:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 14:03:14,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:15,000 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:15,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:15,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:15,216 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:03:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:15,216 INFO L85 PathProgramCache]: Analyzing trace with hash 620618639, now seen corresponding path program 1 times [2021-11-19 14:03:15,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:15,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734902866] [2021-11-19 14:03:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:15,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:15,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:15,219 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:15,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:03:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:15,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:03:15,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:15,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:16,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:16,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734902866] [2021-11-19 14:03:16,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734902866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:16,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1281127563] [2021-11-19 14:03:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:16,056 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:16,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:16,061 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:16,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:03:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:03:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:16,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:16,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1281127563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:16,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423769889] [2021-11-19 14:03:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:16,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:03:16,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:03:16,757 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:03:16,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 14:03:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:16,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:03:16,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:17,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:17,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423769889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:17,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:03:17,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-19 14:03:17,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600550933] [2021-11-19 14:03:17,494 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:03:17,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:03:17,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:03:17,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:03:17,496 INFO L87 Difference]: Start difference. First operand 1255 states and 1470 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:03:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:18,145 INFO L93 Difference]: Finished difference Result 1269 states and 1487 transitions. [2021-11-19 14:03:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:03:18,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 75 [2021-11-19 14:03:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:18,150 INFO L225 Difference]: With dead ends: 1269 [2021-11-19 14:03:18,150 INFO L226 Difference]: Without dead ends: 1263 [2021-11-19 14:03:18,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:03:18,151 INFO L933 BasicCegarLoop]: 1053 mSDtfsCounter, 41 mSDsluCounter, 3157 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 4210 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:18,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 4210 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:03:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-11-19 14:03:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1261. [2021-11-19 14:03:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 814 states have (on average 1.7936117936117937) internal successors, (1460), 1254 states have internal predecessors, (1460), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:03:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1477 transitions. [2021-11-19 14:03:18,173 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1477 transitions. Word has length 75 [2021-11-19 14:03:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:18,174 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 1477 transitions. [2021-11-19 14:03:18,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:03:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1477 transitions. [2021-11-19 14:03:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 14:03:18,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:18,175 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:18,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-19 14:03:18,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 14:03:18,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-19 14:03:18,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:18,791 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-19 14:03:18,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:18,792 INFO L85 PathProgramCache]: Analyzing trace with hash -652176177, now seen corresponding path program 2 times [2021-11-19 14:03:18,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:18,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123005499] [2021-11-19 14:03:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:03:18,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:18,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:18,794 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:18,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:03:19,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:03:19,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:03:19,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:03:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:19,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:20,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:20,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123005499] [2021-11-19 14:03:20,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123005499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:20,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [478574282] [2021-11-19 14:03:20,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:03:20,052 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:20,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:20,053 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:20,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 14:03:21,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:03:21,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:03:21,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:03:21,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:21,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:21,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [478574282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:21,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939270049] [2021-11-19 14:03:21,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:03:21,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:03:21,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:03:21,434 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:03:21,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348ef0c0-23b0-448f-b7e8-5fea1e4ff8f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 14:03:53,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:03:53,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:03:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 14:03:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:53,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:03:53,636 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 14:03:53,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-11-19 14:03:53,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:03:53,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 14:03:53,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-19 14:03:53,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-19 14:03:53,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-19 14:06:18,517 WARN L227 SmtUtils]: Spent 33.65s on a formula simplification. DAG size of input: 114 DAG size of output: 34 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 14:06:18,518 INFO L354 Elim1Store]: treesize reduction 884, result has 5.9 percent of original size [2021-11-19 14:06:18,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 135 [2021-11-19 14:07:04,339 WARN L227 SmtUtils]: Spent 45.81s on a formula simplification. DAG size of input: 118 DAG size of output: 38 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 14:07:04,340 INFO L354 Elim1Store]: treesize reduction 1178, result has 7.5 percent of original size [2021-11-19 14:07:04,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 226 [2021-11-19 14:07:13,621 INFO L354 Elim1Store]: treesize reduction 276, result has 0.4 percent of original size [2021-11-19 14:07:13,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 241 treesize of output 118 [2021-11-19 14:07:13,645 INFO L354 Elim1Store]: treesize reduction 276, result has 0.4 percent of original size [2021-11-19 14:07:13,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 94 treesize of output 46 [2021-11-19 14:07:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 15 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:07:25,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:49,854 WARN L227 SmtUtils]: Spent 23.07s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-19 14:08:11,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (exists ((|v_#Ultimate.C_memset_#value_16| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_103| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_109| (_ BitVec 32))) (not (let ((.cse0 (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_104|)) (.cse2 (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_103|)) (.cse3 (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_105|)) (.cse4 (bvadd |v_#Ultimate.C_memset_#t~loopctr279_107| |v_#Ultimate.C_memset_#ptr.offset_18|)) (.cse5 (bvadd |v_#Ultimate.C_memset_#t~loopctr279_109| |v_#Ultimate.C_memset_#ptr.offset_18|)) (.cse6 (bvadd |v_#Ultimate.C_memset_#t~loopctr279_108| |v_#Ultimate.C_memset_#ptr.offset_18|)) (.cse7 (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))) (bvule (bvadd (select (select (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |v_#Ultimate.C_memset_#value_16|)))) (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base|) .cse0 .cse1) .cse2 .cse1) .cse3 .cse1) .cse4 .cse1) .cse5 .cse1) .cse6 .cse1))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse7) (_ bv20 32)) (select |c_#length| (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) .cse0 (_ bv0 32)) .cse2 (_ bv0 32)) .cse3 (_ bv0 32)) .cse4 (_ bv0 32)) .cse5 (_ bv0 32)) .cse6 (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse7)))))) (exists ((|v_#Ultimate.C_memset_#value_16| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_103| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_109| (_ BitVec 32))) (not (let ((.cse8 (select (select (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| (let ((.cse9 ((_ zero_extend 24) ((_ extract 7 0) |v_#Ultimate.C_memset_#value_16|)))) (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_104|) .cse9) (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_103|) .cse9) (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_105|) .cse9) (bvadd |v_#Ultimate.C_memset_#t~loopctr279_107| |v_#Ultimate.C_memset_#ptr.offset_18|) .cse9) (bvadd |v_#Ultimate.C_memset_#t~loopctr279_109| |v_#Ultimate.C_memset_#ptr.offset_18|) .cse9) (bvadd |v_#Ultimate.C_memset_#t~loopctr279_108| |v_#Ultimate.C_memset_#ptr.offset_18|) .cse9))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)))) (bvule (bvadd (_ bv16 32) .cse8) (bvadd .cse8 (_ bv20 32)))))) (let ((.cse11 (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))) (let ((.cse12 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse11))) (let ((.cse10 (bvadd .cse12 (_ bv20 32)))) (and (bvule .cse10 (select |c_#length| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse11))) (bvule (bvadd (_ bv16 32) .cse12) .cse10))))))) is different from false [2021-11-19 14:08:18,460 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (exists ((|v_#Ultimate.C_memset_#value_16| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_103| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_109| (_ BitVec 32))) (not (let ((.cse0 (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_104|)) (.cse2 (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_103|)) (.cse3 (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_105|)) (.cse4 (bvadd |v_#Ultimate.C_memset_#t~loopctr279_107| |v_#Ultimate.C_memset_#ptr.offset_18|)) (.cse5 (bvadd |v_#Ultimate.C_memset_#t~loopctr279_109| |v_#Ultimate.C_memset_#ptr.offset_18|)) (.cse6 (bvadd |v_#Ultimate.C_memset_#t~loopctr279_108| |v_#Ultimate.C_memset_#ptr.offset_18|)) (.cse7 (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))) (bvule (bvadd (select (select (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |v_#Ultimate.C_memset_#value_16|)))) (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base|) .cse0 .cse1) .cse2 .cse1) .cse3 .cse1) .cse4 .cse1) .cse5 .cse1) .cse6 .cse1))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse7) (_ bv20 32)) (select |c_#length| (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) .cse0 (_ bv0 32)) .cse2 (_ bv0 32)) .cse3 (_ bv0 32)) .cse4 (_ bv0 32)) .cse5 (_ bv0 32)) .cse6 (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse7)))))) (and (forall ((|#Ultimate.C_memset_#t~loopctr279| (_ BitVec 32))) (let ((.cse8 (bvadd |c_#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr279|)) (.cse9 (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_#memory_$Pointer$.offset| |c_#Ultimate.C_memset_#ptr.base|) .cse8 ((_ zero_extend 24) ((_ extract 7 0) |c_#Ultimate.C_memset_#value|)))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse9) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base|) .cse8 (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse9))))) (forall ((|#Ultimate.C_memset_#t~loopctr279| (_ BitVec 32))) (let ((.cse10 (select (select (store |c_#memory_$Pointer$.offset| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_#memory_$Pointer$.offset| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr279|) ((_ zero_extend 24) ((_ extract 7 0) |c_#Ultimate.C_memset_#value|)))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)))) (bvule (bvadd (_ bv16 32) .cse10) (bvadd .cse10 (_ bv20 32)))))) (exists ((|v_#Ultimate.C_memset_#value_16| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_103| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_109| (_ BitVec 32))) (not (let ((.cse11 (select (select (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| (let ((.cse12 ((_ zero_extend 24) ((_ extract 7 0) |v_#Ultimate.C_memset_#value_16|)))) (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_104|) .cse12) (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_103|) .cse12) (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_105|) .cse12) (bvadd |v_#Ultimate.C_memset_#t~loopctr279_107| |v_#Ultimate.C_memset_#ptr.offset_18|) .cse12) (bvadd |v_#Ultimate.C_memset_#t~loopctr279_109| |v_#Ultimate.C_memset_#ptr.offset_18|) .cse12) (bvadd |v_#Ultimate.C_memset_#t~loopctr279_108| |v_#Ultimate.C_memset_#ptr.offset_18|) .cse12))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)))) (bvule (bvadd (_ bv16 32) .cse11) (bvadd .cse11 (_ bv20 32)))))))) is different from false [2021-11-19 14:12:07,703 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (exists ((|v_#Ultimate.C_memset_#value_16| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_103| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_109| (_ BitVec 32))) (not (let ((.cse0 (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_104|)) (.cse2 (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_103|)) (.cse3 (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_105|)) (.cse4 (bvadd |v_#Ultimate.C_memset_#t~loopctr279_107| |v_#Ultimate.C_memset_#ptr.offset_18|)) (.cse5 (bvadd |v_#Ultimate.C_memset_#t~loopctr279_109| |v_#Ultimate.C_memset_#ptr.offset_18|)) (.cse6 (bvadd |v_#Ultimate.C_memset_#t~loopctr279_108| |v_#Ultimate.C_memset_#ptr.offset_18|)) (.cse7 (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))) (bvule (bvadd (select (select (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |v_#Ultimate.C_memset_#value_16|)))) (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base|) .cse0 .cse1) .cse2 .cse1) .cse3 .cse1) .cse4 .cse1) .cse5 .cse1) .cse6 .cse1))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse7) (_ bv20 32)) (select |c_#length| (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) .cse0 (_ bv0 32)) .cse2 (_ bv0 32)) .cse3 (_ bv0 32)) .cse4 (_ bv0 32)) .cse5 (_ bv0 32)) .cse6 (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse7)))))) (exists ((|v_#Ultimate.C_memset_#value_16| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_103| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr279_109| (_ BitVec 32))) (not (let ((.cse8 (select (select (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| (let ((.cse9 ((_ zero_extend 24) ((_ extract 7 0) |v_#Ultimate.C_memset_#value_16|)))) (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_104|) .cse9) (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_103|) .cse9) (bvadd |v_#Ultimate.C_memset_#ptr.offset_18| |v_#Ultimate.C_memset_#t~loopctr279_105|) .cse9) (bvadd |v_#Ultimate.C_memset_#t~loopctr279_107| |v_#Ultimate.C_memset_#ptr.offset_18|) .cse9) (bvadd |v_#Ultimate.C_memset_#t~loopctr279_109| |v_#Ultimate.C_memset_#ptr.offset_18|) .cse9) (bvadd |v_#Ultimate.C_memset_#t~loopctr279_108| |v_#Ultimate.C_memset_#ptr.offset_18|) .cse9))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)))) (bvule (bvadd (_ bv16 32) .cse8) (bvadd .cse8 (_ bv20 32)))))) (and (forall ((v_subst_6 (_ BitVec 32)) (v_subst_4 (_ BitVec 32)) (v_subst_2 (_ BitVec 32)) (|#Ultimate.C_memset_#t~loopctr279| (_ BitVec 32)) (v_subst_7 (_ BitVec 32))) (let ((.cse10 (bvadd |c_#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr279|)) (.cse12 (bvadd |c_#Ultimate.C_memset_#ptr.offset| v_subst_7)) (.cse13 (bvadd |c_#Ultimate.C_memset_#ptr.offset| v_subst_6)) (.cse14 (bvadd |c_#Ultimate.C_memset_#ptr.offset| v_subst_4)) (.cse15 (bvadd |c_#Ultimate.C_memset_#ptr.offset| v_subst_2)) (.cse16 (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_#Ultimate.C_memset_#ptr.base| (let ((.cse11 ((_ zero_extend 24) ((_ extract 7 0) |c_#Ultimate.C_memset_#value|)))) (store (store (store (store (store (select |c_#memory_$Pointer$.offset| |c_#Ultimate.C_memset_#ptr.base|) .cse10 .cse11) .cse12 .cse11) .cse13 .cse11) .cse14 .cse11) .cse15 .cse11))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse16) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (select |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base|) .cse10 (_ bv0 32)) .cse12 (_ bv0 32)) .cse13 (_ bv0 32)) .cse14 (_ bv0 32)) .cse15 (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) .cse16))))) (forall ((v_subst_5 (_ BitVec 32)) (v_subst_3 (_ BitVec 32)) (|#Ultimate.C_memset_#t~loopctr279| (_ BitVec 32)) (v_subst_1 (_ BitVec 32)) (v_subst_8 (_ BitVec 32))) (let ((.cse17 (select (select (store |c_#memory_$Pointer$.offset| |c_#Ultimate.C_memset_#ptr.base| (let ((.cse18 ((_ zero_extend 24) ((_ extract 7 0) |c_#Ultimate.C_memset_#value|)))) (store (store (store (store (store (select |c_#memory_$Pointer$.offset| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr279|) .cse18) (bvadd |c_#Ultimate.C_memset_#ptr.offset| v_subst_8) .cse18) (bvadd |c_#Ultimate.C_memset_#ptr.offset| v_subst_5) .cse18) (bvadd |c_#Ultimate.C_memset_#ptr.offset| v_subst_3) .cse18) (bvadd |c_#Ultimate.C_memset_#ptr.offset| v_subst_1) .cse18))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)))) (bvule (bvadd .cse17 (_ bv16 32)) (bvadd .cse17 (_ bv20 32)))))))) is different from false [2021-11-19 14:15:04,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 14:15:04,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:15:04,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 18 [2021-11-19 14:15:04,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018865374] [2021-11-19 14:15:04,568 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:04,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:15:04,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:04,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:15:04,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1147, Unknown=181, NotChecked=228, Total=1722 [2021-11-19 14:15:04,570 INFO L87 Difference]: Start difference. First operand 1261 states and 1477 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)