./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:22:14,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:22:14,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:22:14,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:22:14,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:22:14,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:22:14,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:22:14,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:22:14,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:22:14,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:22:14,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:22:14,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:22:14,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:22:14,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:22:14,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:22:14,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:22:14,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:22:14,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:22:14,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:22:14,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:22:14,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:22:14,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:22:14,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:22:14,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:22:14,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:22:14,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:22:14,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:22:14,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:22:14,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:22:14,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:22:14,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:22:14,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:22:14,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:22:14,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:22:14,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:22:14,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:22:14,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:22:14,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:22:14,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:22:14,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:22:14,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:22:14,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-22 15:22:14,373 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:22:14,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:22:14,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:22:14,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:22:14,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:22:14,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:22:14,376 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:22:14,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:22:14,376 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:22:14,376 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 15:22:14,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:22:14,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:22:14,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:22:14,377 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 15:22:14,378 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 15:22:14,378 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 15:22:14,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:22:14,378 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 15:22:14,379 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:22:14,379 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:22:14,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:22:14,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:22:14,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:22:14,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:22:14,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:22:14,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:22:14,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:22:14,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:22:14,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:22:14,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 [2021-11-22 15:22:14,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:22:14,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:22:14,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:22:14,714 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:22:14,715 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:22:14,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-22 15:22:14,792 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data/64b09847a/ada0c53c5e4d42aa9a4684b626291822/FLAG102e98373 [2021-11-22 15:22:15,721 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:22:15,721 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-22 15:22:15,767 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data/64b09847a/ada0c53c5e4d42aa9a4684b626291822/FLAG102e98373 [2021-11-22 15:22:16,275 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data/64b09847a/ada0c53c5e4d42aa9a4684b626291822 [2021-11-22 15:22:16,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:22:16,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:22:16,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:22:16,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:22:16,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:22:16,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:22:16" (1/1) ... [2021-11-22 15:22:16,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6efa2310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:16, skipping insertion in model container [2021-11-22 15:22:16,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:22:16" (1/1) ... [2021-11-22 15:22:16,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:22:16,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:22:17,131 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_06d205cb-b474-4032-9748-69f4b096782f/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-22 15:22:17,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:22:17,554 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) [2021-11-22 15:22:17,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c6ad28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:17, skipping insertion in model container [2021-11-22 15:22:17,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:22:17,556 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-22 15:22:17,558 INFO L158 Benchmark]: Toolchain (without parser) took 1275.58ms. Allocated memory is still 104.9MB. Free memory was 69.5MB in the beginning and 59.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 15:22:17,559 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 104.9MB. Free memory was 58.1MB in the beginning and 58.1MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:22:17,560 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1272.42ms. Allocated memory is still 104.9MB. Free memory was 69.3MB in the beginning and 59.7MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 15:22:17,563 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 104.9MB. Free memory was 58.1MB in the beginning and 58.1MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1272.42ms. Allocated memory is still 104.9MB. Free memory was 69.3MB in the beginning and 59.7MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:22:20,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:22:20,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:22:20,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:22:20,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:22:20,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:22:20,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:22:20,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:22:20,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:22:20,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:22:20,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:22:20,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:22:20,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:22:20,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:22:20,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:22:20,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:22:20,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:22:20,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:22:20,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:22:20,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:22:20,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:22:20,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:22:20,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:22:20,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:22:20,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:22:20,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:22:20,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:22:20,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:22:20,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:22:20,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:22:20,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:22:20,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:22:20,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:22:20,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:22:20,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:22:20,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:22:20,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:22:20,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:22:20,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:22:20,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:22:20,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:22:20,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-22 15:22:20,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:22:20,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:22:20,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:22:20,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:22:20,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:22:20,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:22:20,716 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:22:20,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:22:20,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:22:20,717 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 15:22:20,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:22:20,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:22:20,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:22:20,719 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 15:22:20,720 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 15:22:20,720 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 15:22:20,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:22:20,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 15:22:20,721 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-22 15:22:20,721 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-22 15:22:20,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:22:20,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:22:20,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:22:20,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:22:20,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:22:20,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:22:20,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:22:20,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:22:20,724 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-22 15:22:20,724 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-22 15:22:20,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:22:20,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-22 15:22:20,725 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_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 [2021-11-22 15:22:21,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:22:21,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:22:21,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:22:21,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:22:21,298 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:22:21,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-22 15:22:21,401 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data/9a2d5baf7/7e2fdea1b17545ccae352be39ab430e3/FLAG0958f60fe [2021-11-22 15:22:22,351 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:22:22,354 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-22 15:22:22,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data/9a2d5baf7/7e2fdea1b17545ccae352be39ab430e3/FLAG0958f60fe [2021-11-22 15:22:22,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/data/9a2d5baf7/7e2fdea1b17545ccae352be39ab430e3 [2021-11-22 15:22:22,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:22:22,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:22:22,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:22:22,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:22:22,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:22:22,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:22:22" (1/1) ... [2021-11-22 15:22:22,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b440f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:22, skipping insertion in model container [2021-11-22 15:22:22,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:22:22" (1/1) ... [2021-11-22 15:22:22,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:22:22,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:22:23,242 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_06d205cb-b474-4032-9748-69f4b096782f/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-22 15:22:23,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:22:23,732 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-22 15:22:23,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:22:23,805 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_06d205cb-b474-4032-9748-69f4b096782f/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-22 15:22:24,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:22:24,072 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:22:24,129 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_06d205cb-b474-4032-9748-69f4b096782f/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-22 15:22:24,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:22:24,432 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:22:24,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24 WrapperNode [2021-11-22 15:22:24,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:22:24,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:22:24,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:22:24,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:22:24,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:24,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:24,763 INFO L137 Inliner]: procedures = 180, calls = 575, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 2518 [2021-11-22 15:22:24,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:22:24,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:22:24,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:22:24,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:22:24,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:24,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:24,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:24,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:24,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:25,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:25,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:25,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:22:25,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:22:25,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:22:25,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:22:25,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (1/1) ... [2021-11-22 15:22:25,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:22:25,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:22:25,147 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:22:25,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:22:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-22 15:22:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-22 15:22:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 15:22:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:22:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 15:22:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:22:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-22 15:22:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 15:22:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:22:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-22 15:22:25,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-22 15:22:25,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:22:25,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:22:25,615 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:22:25,617 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:22:38,725 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:22:38,757 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:22:38,758 INFO L301 CfgBuilder]: Removed 160 assume(true) statements. [2021-11-22 15:22:38,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:22:38 BoogieIcfgContainer [2021-11-22 15:22:38,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:22:38,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:22:38,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:22:38,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:22:38,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:22:22" (1/3) ... [2021-11-22 15:22:38,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cea9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:22:38, skipping insertion in model container [2021-11-22 15:22:38,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:22:24" (2/3) ... [2021-11-22 15:22:38,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cea9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:22:38, skipping insertion in model container [2021-11-22 15:22:38,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:22:38" (3/3) ... [2021-11-22 15:22:38,774 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-2.i [2021-11-22 15:22:38,780 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:22:38,781 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1110 error locations. [2021-11-22 15:22:38,837 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:22:38,846 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 [2021-11-22 15:22:38,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1110 error locations. [2021-11-22 15:22:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 2338 states, 1227 states have (on average 2.1833740831295843) internal successors, (2679), 2337 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-22 15:22:38,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:38,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-22 15:22:38,926 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:22:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:38,934 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-22 15:22:38,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:22:38,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983399845] [2021-11-22 15:22:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:38,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:22:38,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:22:38,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:22:38,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 15:22:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:39,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:22:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:22:39,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 15:22:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:39,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:22:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:39,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:22:39,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983399845] [2021-11-22 15:22:39,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983399845] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:39,398 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:39,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 15:22:39,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063612946] [2021-11-22 15:22:39,401 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:39,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:22:39,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:22:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:22:39,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:22:39,494 INFO L87 Difference]: Start difference. First operand has 2338 states, 1227 states have (on average 2.1833740831295843) internal successors, (2679), 2337 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 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) [2021-11-22 15:22:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:45,552 INFO L93 Difference]: Finished difference Result 3022 states and 3214 transitions. [2021-11-22 15:22:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:22:45,557 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 [2021-11-22 15:22:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:45,604 INFO L225 Difference]: With dead ends: 3022 [2021-11-22 15:22:45,604 INFO L226 Difference]: Without dead ends: 3020 [2021-11-22 15:22:45,606 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 [2021-11-22 15:22:45,611 INFO L933 BasicCegarLoop]: 1464 mSDtfsCounter, 2276 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2276 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:45,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2276 Valid, 1917 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-22 15:22:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2021-11-22 15:22:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 2486. [2021-11-22 15:22:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 1399 states have (on average 2.0207290922087204) internal successors, (2827), 2485 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 2827 transitions. [2021-11-22 15:22:45,799 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 2827 transitions. Word has length 3 [2021-11-22 15:22:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:45,800 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 2827 transitions. [2021-11-22 15:22:45,800 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) [2021-11-22 15:22:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 2827 transitions. [2021-11-22 15:22:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-22 15:22:45,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:45,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-22 15:22:45,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:22:46,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:22:46,024 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:22:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-22 15:22:46,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:22:46,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932626342] [2021-11-22 15:22:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:46,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:22:46,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:22:46,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:22:46,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 15:22:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:22:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:22:46,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:22:46,312 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 [2021-11-22 15:22:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:46,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:22:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:46,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:22:46,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932626342] [2021-11-22 15:22:46,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932626342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:22:46,409 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:22:46,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-22 15:22:46,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007776208] [2021-11-22 15:22:46,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:22:46,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:22:46,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:22:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:22:46,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:22:46,418 INFO L87 Difference]: Start difference. First operand 2486 states and 2827 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) [2021-11-22 15:22:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:22:59,380 INFO L93 Difference]: Finished difference Result 3870 states and 4334 transitions. [2021-11-22 15:22:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:22:59,382 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 [2021-11-22 15:22:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:22:59,408 INFO L225 Difference]: With dead ends: 3870 [2021-11-22 15:22:59,409 INFO L226 Difference]: Without dead ends: 3870 [2021-11-22 15:22:59,409 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 [2021-11-22 15:22:59,413 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 2878 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2878 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:22:59,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2878 Valid, 3673 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2021-11-22 15:22:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-11-22 15:22:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 2650. [2021-11-22 15:22:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2650 states, 1575 states have (on average 2.012063492063492) internal successors, (3169), 2649 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 3169 transitions. [2021-11-22 15:22:59,542 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 3169 transitions. Word has length 3 [2021-11-22 15:22:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:22:59,543 INFO L470 AbstractCegarLoop]: Abstraction has 2650 states and 3169 transitions. [2021-11-22 15:22:59,544 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) [2021-11-22 15:22:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 3169 transitions. [2021-11-22 15:22:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 15:22:59,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:22:59,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:22:59,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:22:59,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:22:59,763 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:22:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:22:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-22 15:22:59,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:22:59,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315167391] [2021-11-22 15:22:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:22:59,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:22:59,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:22:59,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:22:59,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-22 15:23:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:23:00,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:00,034 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 [2021-11-22 15:23:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:00,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:00,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315167391] [2021-11-22 15:23:00,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315167391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:00,093 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:00,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 15:23:00,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725897857] [2021-11-22 15:23:00,095 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:00,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:23:00,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:00,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:23:00,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:23:00,098 INFO L87 Difference]: Start difference. First operand 2650 states and 3169 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) [2021-11-22 15:23:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:04,536 INFO L93 Difference]: Finished difference Result 3472 states and 4003 transitions. [2021-11-22 15:23:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:23:04,537 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 [2021-11-22 15:23:04,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:04,561 INFO L225 Difference]: With dead ends: 3472 [2021-11-22 15:23:04,561 INFO L226 Difference]: Without dead ends: 3472 [2021-11-22 15:23:04,563 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 [2021-11-22 15:23:04,566 INFO L933 BasicCegarLoop]: 2330 mSDtfsCounter, 2121 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2121 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:04,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2121 Valid, 3146 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-22 15:23:04,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2021-11-22 15:23:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 2559. [2021-11-22 15:23:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1575 states have (on average 1.9326984126984128) internal successors, (3044), 2558 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3044 transitions. [2021-11-22 15:23:04,647 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3044 transitions. Word has length 8 [2021-11-22 15:23:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:04,648 INFO L470 AbstractCegarLoop]: Abstraction has 2559 states and 3044 transitions. [2021-11-22 15:23:04,648 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) [2021-11-22 15:23:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3044 transitions. [2021-11-22 15:23:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 15:23:04,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:04,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:04,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:04,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:04,863 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-22 15:23:04,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:04,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918051139] [2021-11-22 15:23:04,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:04,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:04,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:04,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:04,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-22 15:23:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:23:05,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:05,142 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 [2021-11-22 15:23:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:05,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:05,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918051139] [2021-11-22 15:23:05,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918051139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:05,300 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:05,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-22 15:23:05,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081220305] [2021-11-22 15:23:05,300 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:05,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:23:05,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:23:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:05,302 INFO L87 Difference]: Start difference. First operand 2559 states and 3044 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) [2021-11-22 15:23:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:17,429 INFO L93 Difference]: Finished difference Result 3601 states and 4034 transitions. [2021-11-22 15:23:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:23:17,430 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 [2021-11-22 15:23:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:17,456 INFO L225 Difference]: With dead ends: 3601 [2021-11-22 15:23:17,457 INFO L226 Difference]: Without dead ends: 3601 [2021-11-22 15:23:17,457 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 [2021-11-22 15:23:17,460 INFO L933 BasicCegarLoop]: 2669 mSDtfsCounter, 1555 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 4995 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:17,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1555 Valid, 4995 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2021-11-22 15:23:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2021-11-22 15:23:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 2551. [2021-11-22 15:23:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 1577 states have (on average 1.917564996829423) internal successors, (3024), 2550 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 3024 transitions. [2021-11-22 15:23:17,531 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 3024 transitions. Word has length 8 [2021-11-22 15:23:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:17,534 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 3024 transitions. [2021-11-22 15:23:17,535 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) [2021-11-22 15:23:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 3024 transitions. [2021-11-22 15:23:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:23:17,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:17,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:17,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:17,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:17,755 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-22 15:23:17,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:17,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964725797] [2021-11-22 15:23:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:17,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:17,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:17,762 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:17,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-22 15:23:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:23:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:18,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:18,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:18,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964725797] [2021-11-22 15:23:18,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964725797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:18,037 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:18,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 15:23:18,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753991598] [2021-11-22 15:23:18,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:18,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:23:18,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:23:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:18,040 INFO L87 Difference]: Start difference. First operand 2551 states and 3024 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:18,099 INFO L93 Difference]: Finished difference Result 2509 states and 2981 transitions. [2021-11-22 15:23:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:23:18,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 15:23:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:18,138 INFO L225 Difference]: With dead ends: 2509 [2021-11-22 15:23:18,139 INFO L226 Difference]: Without dead ends: 2509 [2021-11-22 15:23:18,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:18,141 INFO L933 BasicCegarLoop]: 2295 mSDtfsCounter, 1110 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 4685 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 [2021-11-22 15:23:18,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 4685 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:23:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-11-22 15:23:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2509. [2021-11-22 15:23:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1559 states have (on average 1.912123155869147) internal successors, (2981), 2508 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 2981 transitions. [2021-11-22 15:23:18,207 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 2981 transitions. Word has length 11 [2021-11-22 15:23:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:18,208 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 2981 transitions. [2021-11-22 15:23:18,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 2981 transitions. [2021-11-22 15:23:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 15:23:18,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:18,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:18,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:18,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:18,433 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:18,434 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-22 15:23:18,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:18,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109071420] [2021-11-22 15:23:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:18,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:18,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:18,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:18,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-22 15:23:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:23:18,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:18,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:18,756 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:18,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109071420] [2021-11-22 15:23:18,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109071420] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:18,756 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:18,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-22 15:23:18,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281721827] [2021-11-22 15:23:18,757 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:18,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:23:18,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:23:18,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:23:18,759 INFO L87 Difference]: Start difference. First operand 2509 states and 2981 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:18,890 INFO L93 Difference]: Finished difference Result 2488 states and 2953 transitions. [2021-11-22 15:23:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:23:18,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 15:23:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:18,906 INFO L225 Difference]: With dead ends: 2488 [2021-11-22 15:23:18,907 INFO L226 Difference]: Without dead ends: 2488 [2021-11-22 15:23:18,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:23:18,908 INFO L933 BasicCegarLoop]: 2250 mSDtfsCounter, 2152 mSDsluCounter, 3438 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 5688 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:18,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 5688 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:23:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-11-22 15:23:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2487. [2021-11-22 15:23:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 1551 states have (on average 1.9032882011605416) internal successors, (2952), 2486 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 2952 transitions. [2021-11-22 15:23:18,971 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 2952 transitions. Word has length 13 [2021-11-22 15:23:18,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:18,971 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 2952 transitions. [2021-11-22 15:23:18,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 2952 transitions. [2021-11-22 15:23:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 15:23:18,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:18,974 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] [2021-11-22 15:23:18,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:19,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:19,189 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:19,189 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-22 15:23:19,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:19,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443079408] [2021-11-22 15:23:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:19,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:19,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:19,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-22 15:23:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:19,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:23:19,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:19,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:19,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:19,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443079408] [2021-11-22 15:23:19,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443079408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:19,559 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:19,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 15:23:19,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940640696] [2021-11-22 15:23:19,560 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:19,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:23:19,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:23:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:19,562 INFO L87 Difference]: Start difference. First operand 2487 states and 2952 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:19,649 INFO L93 Difference]: Finished difference Result 4013 states and 4586 transitions. [2021-11-22 15:23:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:23:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 15:23:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:19,674 INFO L225 Difference]: With dead ends: 4013 [2021-11-22 15:23:19,674 INFO L226 Difference]: Without dead ends: 4013 [2021-11-22 15:23:19,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:19,676 INFO L933 BasicCegarLoop]: 3893 mSDtfsCounter, 4450 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4450 SdHoareTripleChecker+Valid, 5570 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:19,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4450 Valid, 5570 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:23:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2021-11-22 15:23:19,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 2409. [2021-11-22 15:23:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 1497 states have (on average 1.8857715430861723) internal successors, (2823), 2408 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 2823 transitions. [2021-11-22 15:23:19,752 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 2823 transitions. Word has length 20 [2021-11-22 15:23:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:19,753 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 2823 transitions. [2021-11-22 15:23:19,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 2823 transitions. [2021-11-22 15:23:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 15:23:19,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:19,756 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] [2021-11-22 15:23:19,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:19,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:19,969 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:19,970 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-22 15:23:19,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:19,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73603432] [2021-11-22 15:23:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:19,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:19,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:19,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:19,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-22 15:23:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:23:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:20,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:20,289 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73603432] [2021-11-22 15:23:20,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73603432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:20,290 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:20,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 15:23:20,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010850110] [2021-11-22 15:23:20,291 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:20,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:23:20,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:23:20,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:20,293 INFO L87 Difference]: Start difference. First operand 2409 states and 2823 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:20,374 INFO L93 Difference]: Finished difference Result 3936 states and 4509 transitions. [2021-11-22 15:23:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:23:20,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 15:23:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:20,406 INFO L225 Difference]: With dead ends: 3936 [2021-11-22 15:23:20,406 INFO L226 Difference]: Without dead ends: 3936 [2021-11-22 15:23:20,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:20,408 INFO L933 BasicCegarLoop]: 3814 mSDtfsCounter, 4364 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4364 SdHoareTripleChecker+Valid, 5455 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:20,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4364 Valid, 5455 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:23:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-11-22 15:23:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 2367. [2021-11-22 15:23:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 1479 states have (on average 1.8796484110885734) internal successors, (2780), 2366 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2780 transitions. [2021-11-22 15:23:20,476 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2780 transitions. Word has length 20 [2021-11-22 15:23:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:20,477 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 2780 transitions. [2021-11-22 15:23:20,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2780 transitions. [2021-11-22 15:23:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 15:23:20,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:20,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:20,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:20,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:20,696 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:20,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:20,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-22 15:23:20,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:20,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576426553] [2021-11-22 15:23:20,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:20,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:20,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:20,700 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:20,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-22 15:23:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:23:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:21,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:21,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:21,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576426553] [2021-11-22 15:23:21,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576426553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:21,046 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:21,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-22 15:23:21,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464414774] [2021-11-22 15:23:21,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:21,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:23:21,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:23:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:23:21,049 INFO L87 Difference]: Start difference. First operand 2367 states and 2780 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:21,199 INFO L93 Difference]: Finished difference Result 3894 states and 4416 transitions. [2021-11-22 15:23:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:23:21,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 15:23:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:21,216 INFO L225 Difference]: With dead ends: 3894 [2021-11-22 15:23:21,216 INFO L226 Difference]: Without dead ends: 3894 [2021-11-22 15:23:21,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:23:21,217 INFO L933 BasicCegarLoop]: 3762 mSDtfsCounter, 2153 mSDsluCounter, 7023 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2153 SdHoareTripleChecker+Valid, 10785 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 [2021-11-22 15:23:21,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2153 Valid, 10785 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:23:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-11-22 15:23:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 2329. [2021-11-22 15:23:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1455 states have (on average 1.8508591065292097) internal successors, (2693), 2328 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 2693 transitions. [2021-11-22 15:23:21,287 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 2693 transitions. Word has length 22 [2021-11-22 15:23:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:21,288 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 2693 transitions. [2021-11-22 15:23:21,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 2693 transitions. [2021-11-22 15:23:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 15:23:21,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:21,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:21,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:21,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:21,506 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:21,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-22 15:23:21,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:21,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879837669] [2021-11-22 15:23:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:21,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:21,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:21,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:21,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-22 15:23:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:23:21,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:21,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:21,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:21,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879837669] [2021-11-22 15:23:21,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879837669] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:21,813 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:21,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-22 15:23:21,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084969178] [2021-11-22 15:23:21,814 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:21,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:23:21,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:21,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:23:21,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:23:21,815 INFO L87 Difference]: Start difference. First operand 2329 states and 2693 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:21,922 INFO L93 Difference]: Finished difference Result 3855 states and 4365 transitions. [2021-11-22 15:23:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:23:21,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 15:23:21,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:21,933 INFO L225 Difference]: With dead ends: 3855 [2021-11-22 15:23:21,934 INFO L226 Difference]: Without dead ends: 3855 [2021-11-22 15:23:21,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:23:21,935 INFO L933 BasicCegarLoop]: 3699 mSDtfsCounter, 2118 mSDsluCounter, 6904 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2118 SdHoareTripleChecker+Valid, 10603 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 [2021-11-22 15:23:21,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2118 Valid, 10603 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:23:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-11-22 15:23:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 2307. [2021-11-22 15:23:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 1447 states have (on average 1.8410504492052522) internal successors, (2664), 2306 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 2664 transitions. [2021-11-22 15:23:22,000 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 2664 transitions. Word has length 22 [2021-11-22 15:23:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:22,001 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 2664 transitions. [2021-11-22 15:23:22,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 2664 transitions. [2021-11-22 15:23:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:23:22,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:22,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:22,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:22,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:22,209 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-22 15:23:22,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:22,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917180727] [2021-11-22 15:23:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:22,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:22,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:22,212 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:22,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-22 15:23:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:22,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:23:22,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:22,407 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 [2021-11-22 15:23:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:22,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:22,648 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:22,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917180727] [2021-11-22 15:23:22,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917180727] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:22,649 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:22,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 15:23:22,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188116268] [2021-11-22 15:23:22,650 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:22,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:23:22,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:22,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:23:22,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:22,652 INFO L87 Difference]: Start difference. First operand 2307 states and 2664 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:27,436 INFO L93 Difference]: Finished difference Result 2762 states and 3030 transitions. [2021-11-22 15:23:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:23:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 15:23:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:27,443 INFO L225 Difference]: With dead ends: 2762 [2021-11-22 15:23:27,443 INFO L226 Difference]: Without dead ends: 2762 [2021-11-22 15:23:27,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:23:27,444 INFO L933 BasicCegarLoop]: 1313 mSDtfsCounter, 2967 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2967 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:27,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2967 Valid, 2375 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1781 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-22 15:23:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-11-22 15:23:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2303. [2021-11-22 15:23:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 1447 states have (on average 1.8382861091914307) internal successors, (2660), 2302 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2660 transitions. [2021-11-22 15:23:27,502 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2660 transitions. Word has length 27 [2021-11-22 15:23:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:27,503 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 2660 transitions. [2021-11-22 15:23:27,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2660 transitions. [2021-11-22 15:23:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:23:27,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:27,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:27,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:27,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:27,723 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:27,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:27,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-22 15:23:27,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:27,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514041051] [2021-11-22 15:23:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:27,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:27,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:27,726 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:27,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-22 15:23:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:27,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:23:27,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:27,971 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 [2021-11-22 15:23:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:28,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:28,744 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:28,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514041051] [2021-11-22 15:23:28,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514041051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:28,744 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:28,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-22 15:23:28,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847748095] [2021-11-22 15:23:28,745 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:28,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:23:28,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:23:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:23:28,747 INFO L87 Difference]: Start difference. First operand 2303 states and 2660 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:43,661 INFO L93 Difference]: Finished difference Result 3384 states and 3739 transitions. [2021-11-22 15:23:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:23:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 15:23:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:43,669 INFO L225 Difference]: With dead ends: 3384 [2021-11-22 15:23:43,669 INFO L226 Difference]: Without dead ends: 3384 [2021-11-22 15:23:43,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:23:43,670 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 5661 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 3113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5661 SdHoareTripleChecker+Valid, 4508 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:43,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5661 Valid, 4508 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3113 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2021-11-22 15:23:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-11-22 15:23:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2336. [2021-11-22 15:23:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 1481 states have (on average 1.8210668467251856) internal successors, (2697), 2335 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 2697 transitions. [2021-11-22 15:23:43,723 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 2697 transitions. Word has length 27 [2021-11-22 15:23:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:43,724 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 2697 transitions. [2021-11-22 15:23:43,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 2697 transitions. [2021-11-22 15:23:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 15:23:43,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:43,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:43,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:43,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:43,949 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:43,949 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-22 15:23:43,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:43,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013709920] [2021-11-22 15:23:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:43,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:43,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:43,951 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:43,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-22 15:23:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:44,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:23:44,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:44,182 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 [2021-11-22 15:23:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:44,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:44,438 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:44,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013709920] [2021-11-22 15:23:44,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013709920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:44,438 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:44,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 15:23:44,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354511137] [2021-11-22 15:23:44,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:44,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:23:44,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:44,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:23:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:44,440 INFO L87 Difference]: Start difference. First operand 2336 states and 2697 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:52,610 INFO L93 Difference]: Finished difference Result 4978 states and 5574 transitions. [2021-11-22 15:23:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:23:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 15:23:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:52,623 INFO L225 Difference]: With dead ends: 4978 [2021-11-22 15:23:52,623 INFO L226 Difference]: Without dead ends: 4978 [2021-11-22 15:23:52,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:23:52,625 INFO L933 BasicCegarLoop]: 2423 mSDtfsCounter, 5056 mSDsluCounter, 2558 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5056 SdHoareTripleChecker+Valid, 4981 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:52,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5056 Valid, 4981 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-11-22 15:23:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4978 states. [2021-11-22 15:23:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4978 to 2333. [2021-11-22 15:23:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1481 states have (on average 1.813639432815665) internal successors, (2686), 2332 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 2686 transitions. [2021-11-22 15:23:52,686 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 2686 transitions. Word has length 36 [2021-11-22 15:23:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:52,686 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 2686 transitions. [2021-11-22 15:23:52,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 2686 transitions. [2021-11-22 15:23:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 15:23:52,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:52,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:52,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:52,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:23:52,909 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:23:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:52,910 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-22 15:23:52,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:23:52,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70619034] [2021-11-22 15:23:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:52,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:23:52,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:23:52,914 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:23:52,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-22 15:23:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:53,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:23:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:53,265 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 [2021-11-22 15:23:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:53,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:54,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:23:54,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70619034] [2021-11-22 15:23:54,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70619034] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:54,270 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:54,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-22 15:23:54,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80452479] [2021-11-22 15:23:54,271 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:54,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:23:54,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:23:54,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:23:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:23:54,273 INFO L87 Difference]: Start difference. First operand 2333 states and 2686 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:19,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:19,998 INFO L93 Difference]: Finished difference Result 4911 states and 5447 transitions. [2021-11-22 15:24:19,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:24:19,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 15:24:19,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:20,007 INFO L225 Difference]: With dead ends: 4911 [2021-11-22 15:24:20,007 INFO L226 Difference]: Without dead ends: 4911 [2021-11-22 15:24:20,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:24:20,009 INFO L933 BasicCegarLoop]: 2695 mSDtfsCounter, 6657 mSDsluCounter, 3829 mSDsCounter, 0 mSdLazyCounter, 3679 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6657 SdHoareTripleChecker+Valid, 6524 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:20,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6657 Valid, 6524 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3679 Invalid, 0 Unknown, 0 Unchecked, 25.5s Time] [2021-11-22 15:24:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-11-22 15:24:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 2333. [2021-11-22 15:24:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1481 states have (on average 1.810938555030385) internal successors, (2682), 2332 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 2682 transitions. [2021-11-22 15:24:20,065 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 2682 transitions. Word has length 36 [2021-11-22 15:24:20,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:20,065 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 2682 transitions. [2021-11-22 15:24:20,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 2682 transitions. [2021-11-22 15:24:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 15:24:20,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:20,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:20,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:20,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:24:20,282 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:24:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:20,282 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-22 15:24:20,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:24:20,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947779541] [2021-11-22 15:24:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:20,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:24:20,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:24:20,285 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:24:20,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-22 15:24:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:24:20,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:20,593 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 [2021-11-22 15:24:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:20,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:20,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:24:20,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947779541] [2021-11-22 15:24:20,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947779541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:20,882 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:20,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 15:24:20,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455348224] [2021-11-22 15:24:20,883 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:20,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:24:20,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:24:20,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:24:20,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:24:20,884 INFO L87 Difference]: Start difference. First operand 2333 states and 2682 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:28,308 INFO L93 Difference]: Finished difference Result 4582 states and 5154 transitions. [2021-11-22 15:24:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:24:28,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 15:24:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:28,314 INFO L225 Difference]: With dead ends: 4582 [2021-11-22 15:24:28,314 INFO L226 Difference]: Without dead ends: 4582 [2021-11-22 15:24:28,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:24:28,315 INFO L933 BasicCegarLoop]: 3003 mSDtfsCounter, 3773 mSDsluCounter, 2356 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3773 SdHoareTripleChecker+Valid, 5359 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:28,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3773 Valid, 5359 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3012 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-22 15:24:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-11-22 15:24:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 2329. [2021-11-22 15:24:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1481 states have (on average 1.8082376772451048) internal successors, (2678), 2328 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 2678 transitions. [2021-11-22 15:24:28,363 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 2678 transitions. Word has length 36 [2021-11-22 15:24:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:28,363 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 2678 transitions. [2021-11-22 15:24:28,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 2678 transitions. [2021-11-22 15:24:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 15:24:28,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:28,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:28,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-22 15:24:28,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:24:28,580 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:24:28,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-22 15:24:28,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:24:28,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617321763] [2021-11-22 15:24:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:28,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:24:28,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:24:28,583 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:24:28,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-22 15:24:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:28,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:24:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:28,813 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 [2021-11-22 15:24:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:29,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:29,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:24:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617321763] [2021-11-22 15:24:29,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617321763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:29,638 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:29,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-22 15:24:29,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822464707] [2021-11-22 15:24:29,639 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:29,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:24:29,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:24:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:24:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:24:29,640 INFO L87 Difference]: Start difference. First operand 2329 states and 2678 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:49,784 INFO L93 Difference]: Finished difference Result 4478 states and 4930 transitions. [2021-11-22 15:24:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:24:49,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 15:24:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:49,789 INFO L225 Difference]: With dead ends: 4478 [2021-11-22 15:24:49,789 INFO L226 Difference]: Without dead ends: 4478 [2021-11-22 15:24:49,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:24:49,790 INFO L933 BasicCegarLoop]: 3267 mSDtfsCounter, 2786 mSDsluCounter, 5746 mSDsCounter, 0 mSdLazyCounter, 5459 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 9013 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:49,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 9013 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 5459 Invalid, 0 Unknown, 0 Unchecked, 19.9s Time] [2021-11-22 15:24:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2021-11-22 15:24:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 2325. [2021-11-22 15:24:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 1481 states have (on average 1.8055367994598244) internal successors, (2674), 2324 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 2674 transitions. [2021-11-22 15:24:49,829 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 2674 transitions. Word has length 36 [2021-11-22 15:24:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:49,830 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 2674 transitions. [2021-11-22 15:24:49,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 2674 transitions. [2021-11-22 15:24:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 15:24:49,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:49,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:49,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:50,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:24:50,033 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:24:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-22 15:24:50,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:24:50,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732746540] [2021-11-22 15:24:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:50,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:24:50,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:24:50,036 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:24:50,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-22 15:24:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:50,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:24:50,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:50,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:50,433 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:24:50,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732746540] [2021-11-22 15:24:50,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732746540] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:50,433 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:50,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-22 15:24:50,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341699897] [2021-11-22 15:24:50,434 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:50,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:24:50,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:24:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:24:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:24:50,435 INFO L87 Difference]: Start difference. First operand 2325 states and 2674 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:50,520 INFO L93 Difference]: Finished difference Result 2319 states and 2660 transitions. [2021-11-22 15:24:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:24:50,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-22 15:24:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:50,523 INFO L225 Difference]: With dead ends: 2319 [2021-11-22 15:24:50,523 INFO L226 Difference]: Without dead ends: 2319 [2021-11-22 15:24:50,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:24:50,525 INFO L933 BasicCegarLoop]: 2080 mSDtfsCounter, 1063 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 5168 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:50,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 5168 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:24:50,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-11-22 15:24:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2319. [2021-11-22 15:24:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 1475 states have (on average 1.8033898305084746) internal successors, (2660), 2318 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 2660 transitions. [2021-11-22 15:24:50,560 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 2660 transitions. Word has length 40 [2021-11-22 15:24:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:50,561 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 2660 transitions. [2021-11-22 15:24:50,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 2660 transitions. [2021-11-22 15:24:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-22 15:24:50,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:50,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:50,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:50,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:24:50,777 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:24:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:50,778 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-22 15:24:50,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:24:50,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461327686] [2021-11-22 15:24:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:50,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:24:50,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:24:50,780 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:24:50,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-22 15:24:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:24:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:51,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:51,606 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:24:51,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461327686] [2021-11-22 15:24:51,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461327686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:51,607 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:51,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 15:24:51,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192624534] [2021-11-22 15:24:51,607 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:51,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:24:51,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:24:51,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:24:51,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:24:51,609 INFO L87 Difference]: Start difference. First operand 2319 states and 2660 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:51,987 INFO L93 Difference]: Finished difference Result 3752 states and 4231 transitions. [2021-11-22 15:24:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:24:51,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-22 15:24:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:51,992 INFO L225 Difference]: With dead ends: 3752 [2021-11-22 15:24:51,992 INFO L226 Difference]: Without dead ends: 3752 [2021-11-22 15:24:51,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:24:51,993 INFO L933 BasicCegarLoop]: 2162 mSDtfsCounter, 1507 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 4081 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:51,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 4081 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:24:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-11-22 15:24:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 3099. [2021-11-22 15:24:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2255 states have (on average 1.7787139689578715) internal successors, (4011), 3098 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4011 transitions. [2021-11-22 15:24:52,045 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4011 transitions. Word has length 48 [2021-11-22 15:24:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:52,045 INFO L470 AbstractCegarLoop]: Abstraction has 3099 states and 4011 transitions. [2021-11-22 15:24:52,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4011 transitions. [2021-11-22 15:24:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 15:24:52,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:52,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:52,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:52,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:24:52,260 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:24:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:52,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-22 15:24:52,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:24:52,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003154181] [2021-11-22 15:24:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:52,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:24:52,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:24:52,262 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:24:52,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-22 15:24:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:52,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:24:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:52,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:52,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:24:52,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003154181] [2021-11-22 15:24:52,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003154181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:52,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:52,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-22 15:24:52,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208931145] [2021-11-22 15:24:52,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:52,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:24:52,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:24:52,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:24:52,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:24:52,687 INFO L87 Difference]: Start difference. First operand 3099 states and 4011 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:52,767 INFO L93 Difference]: Finished difference Result 4342 states and 5332 transitions. [2021-11-22 15:24:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:24:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 15:24:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:52,773 INFO L225 Difference]: With dead ends: 4342 [2021-11-22 15:24:52,773 INFO L226 Difference]: Without dead ends: 4342 [2021-11-22 15:24:52,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:24:52,774 INFO L933 BasicCegarLoop]: 3460 mSDtfsCounter, 2087 mSDsluCounter, 4823 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2087 SdHoareTripleChecker+Valid, 8283 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 [2021-11-22 15:24:52,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2087 Valid, 8283 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:24:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-11-22 15:24:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 3075. [2021-11-22 15:24:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 2231 states have (on average 1.77991931869117) internal successors, (3971), 3074 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 3971 transitions. [2021-11-22 15:24:52,826 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 3971 transitions. Word has length 51 [2021-11-22 15:24:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:52,826 INFO L470 AbstractCegarLoop]: Abstraction has 3075 states and 3971 transitions. [2021-11-22 15:24:52,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 3971 transitions. [2021-11-22 15:24:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 15:24:52,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:52,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:52,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:53,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:24:53,043 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:24:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-22 15:24:53,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:24:53,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354900833] [2021-11-22 15:24:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:53,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:24:53,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:24:53,045 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:24:53,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-22 15:24:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:53,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:24:53,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:53,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:53,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:24:53,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354900833] [2021-11-22 15:24:53,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354900833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:53,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:53,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-22 15:24:53,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265820532] [2021-11-22 15:24:53,469 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:53,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:24:53,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:24:53,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:24:53,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:24:53,470 INFO L87 Difference]: Start difference. First operand 3075 states and 3971 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:53,558 INFO L93 Difference]: Finished difference Result 4078 states and 4821 transitions. [2021-11-22 15:24:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:24:53,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 15:24:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:53,564 INFO L225 Difference]: With dead ends: 4078 [2021-11-22 15:24:53,565 INFO L226 Difference]: Without dead ends: 4078 [2021-11-22 15:24:53,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:24:53,566 INFO L933 BasicCegarLoop]: 3501 mSDtfsCounter, 2078 mSDsluCounter, 4914 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 8415 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 [2021-11-22 15:24:53,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2078 Valid, 8415 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:24:53,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-11-22 15:24:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3063. [2021-11-22 15:24:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2219 states have (on average 1.7805317710680486) internal successors, (3951), 3062 states have internal predecessors, (3951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 3951 transitions. [2021-11-22 15:24:53,613 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 3951 transitions. Word has length 54 [2021-11-22 15:24:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:53,613 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 3951 transitions. [2021-11-22 15:24:53,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 3951 transitions. [2021-11-22 15:24:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 15:24:53,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:53,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:53,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:53,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:24:53,828 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:24:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:53,829 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-22 15:24:53,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:24:53,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041682892] [2021-11-22 15:24:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:53,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:24:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:24:53,831 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:24:53,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-22 15:24:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:24:54,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:24:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:24:54,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:24:54,119 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-22 15:24:54,120 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 [2021-11-22 15:24:54,182 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-22 15:24:54,182 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 [2021-11-22 15:24:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:54,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:54,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:24:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041682892] [2021-11-22 15:24:54,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041682892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:54,445 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:54,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 15:24:54,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875461148] [2021-11-22 15:24:54,445 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:54,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:24:54,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:24:54,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:24:54,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:24:54,446 INFO L87 Difference]: Start difference. First operand 3063 states and 3951 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:57,746 INFO L93 Difference]: Finished difference Result 3168 states and 4062 transitions. [2021-11-22 15:24:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:24:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 15:24:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:57,750 INFO L225 Difference]: With dead ends: 3168 [2021-11-22 15:24:57,750 INFO L226 Difference]: Without dead ends: 3168 [2021-11-22 15:24:57,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:24:57,752 INFO L933 BasicCegarLoop]: 1971 mSDtfsCounter, 1007 mSDsluCounter, 4818 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 6789 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:57,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 6789 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-22 15:24:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-11-22 15:24:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 3029. [2021-11-22 15:24:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 2185 states have (on average 1.7922196796338672) internal successors, (3916), 3028 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3916 transitions. [2021-11-22 15:24:57,802 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3916 transitions. Word has length 54 [2021-11-22 15:24:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:57,802 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 3916 transitions. [2021-11-22 15:24:57,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3916 transitions. [2021-11-22 15:24:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-22 15:24:57,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:57,804 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] [2021-11-22 15:24:57,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:58,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:24:58,017 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:24:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:58,018 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-22 15:24:58,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:24:58,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968969001] [2021-11-22 15:24:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:58,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:24:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:24:58,020 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:24:58,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-22 15:24:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:58,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:24:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:58,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:58,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:24:58,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968969001] [2021-11-22 15:24:58,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968969001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:58,947 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:58,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 15:24:58,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950984750] [2021-11-22 15:24:58,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:58,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:24:58,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:24:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:24:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:24:58,949 INFO L87 Difference]: Start difference. First operand 3029 states and 3916 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:59,190 INFO L93 Difference]: Finished difference Result 4404 states and 5506 transitions. [2021-11-22 15:24:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:24:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-22 15:24:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:59,198 INFO L225 Difference]: With dead ends: 4404 [2021-11-22 15:24:59,198 INFO L226 Difference]: Without dead ends: 4404 [2021-11-22 15:24:59,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:24:59,199 INFO L933 BasicCegarLoop]: 2086 mSDtfsCounter, 1179 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:59,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 4033 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:24:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-11-22 15:24:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3813. [2021-11-22 15:24:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 2969 states have (on average 1.7615358706635231) internal successors, (5230), 3812 states have internal predecessors, (5230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5230 transitions. [2021-11-22 15:24:59,291 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5230 transitions. Word has length 59 [2021-11-22 15:24:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:59,292 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5230 transitions. [2021-11-22 15:24:59,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5230 transitions. [2021-11-22 15:24:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-22 15:24:59,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:59,293 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] [2021-11-22 15:24:59,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:59,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:24:59,512 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:24:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:59,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-22 15:24:59,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:24:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591311067] [2021-11-22 15:24:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:59,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:24:59,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:24:59,515 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:24:59,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-22 15:24:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:59,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:24:59,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:59,892 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 [2021-11-22 15:24:59,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-22 15:25:00,631 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:25:00,632 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 [2021-11-22 15:25:00,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 15:25:00,650 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 [2021-11-22 15:25:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:00,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:25:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:06,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:25:06,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591311067] [2021-11-22 15:25:06,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591311067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:25:06,744 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:25:06,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-22 15:25:06,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120619111] [2021-11-22 15:25:06,744 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:25:06,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:25:06,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:25:06,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:25:06,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-22 15:25:06,746 INFO L87 Difference]: Start difference. First operand 3813 states and 5230 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) [2021-11-22 15:25:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:25:18,191 INFO L93 Difference]: Finished difference Result 5689 states and 7772 transitions. [2021-11-22 15:25:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:25:18,191 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 [2021-11-22 15:25:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:25:18,197 INFO L225 Difference]: With dead ends: 5689 [2021-11-22 15:25:18,197 INFO L226 Difference]: Without dead ends: 5689 [2021-11-22 15:25:18,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-22 15:25:18,198 INFO L933 BasicCegarLoop]: 1669 mSDtfsCounter, 2975 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2975 SdHoareTripleChecker+Valid, 3713 SdHoareTripleChecker+Invalid, 4013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1334 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:25:18,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2975 Valid, 3713 Invalid, 4013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2593 Invalid, 0 Unknown, 1334 Unchecked, 11.3s Time] [2021-11-22 15:25:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2021-11-22 15:25:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 3805. [2021-11-22 15:25:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3805 states, 3022 states have (on average 1.7183984116479152) internal successors, (5193), 3804 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 5193 transitions. [2021-11-22 15:25:18,282 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 5193 transitions. Word has length 62 [2021-11-22 15:25:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:25:18,282 INFO L470 AbstractCegarLoop]: Abstraction has 3805 states and 5193 transitions. [2021-11-22 15:25:18,282 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) [2021-11-22 15:25:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 5193 transitions. [2021-11-22 15:25:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-22 15:25:18,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:25:18,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:25:18,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-22 15:25:18,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:25:18,500 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr393REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:25:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:25:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1201169645, now seen corresponding path program 1 times [2021-11-22 15:25:18,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:25:18,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394555368] [2021-11-22 15:25:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:25:18,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:25:18,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:25:18,502 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:25:18,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-22 15:25:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:25:18,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:25:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:25:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:19,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:25:19,135 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 [2021-11-22 15:25:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:19,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:25:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394555368] [2021-11-22 15:25:19,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394555368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:25:19,546 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:25:19,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-22 15:25:19,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765273064] [2021-11-22 15:25:19,546 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:25:19,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:25:19,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:25:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:25:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:25:19,548 INFO L87 Difference]: Start difference. First operand 3805 states and 5193 transitions. Second operand has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:25:24,772 INFO L93 Difference]: Finished difference Result 3806 states and 5186 transitions. [2021-11-22 15:25:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:25:24,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-22 15:25:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:25:24,779 INFO L225 Difference]: With dead ends: 3806 [2021-11-22 15:25:24,779 INFO L226 Difference]: Without dead ends: 3806 [2021-11-22 15:25:24,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:25:24,780 INFO L933 BasicCegarLoop]: 1350 mSDtfsCounter, 1813 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:25:24,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1813 Valid, 2155 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-22 15:25:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-11-22 15:25:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3802. [2021-11-22 15:25:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3022 states have (on average 1.7160820648577102) internal successors, (5186), 3801 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 5186 transitions. [2021-11-22 15:25:24,830 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 5186 transitions. Word has length 64 [2021-11-22 15:25:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:25:24,831 INFO L470 AbstractCegarLoop]: Abstraction has 3802 states and 5186 transitions. [2021-11-22 15:25:24,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 5186 transitions. [2021-11-22 15:25:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-22 15:25:24,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:25:24,832 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] [2021-11-22 15:25:24,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-22 15:25:25,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:25:25,035 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:25:25,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:25:25,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-22 15:25:25,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:25:25,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065943514] [2021-11-22 15:25:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:25:25,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:25:25,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:25:25,037 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:25:25,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-22 15:25:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:25:25,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:25:25,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:25:25,392 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 [2021-11-22 15:25:25,409 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 [2021-11-22 15:25:25,456 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 [2021-11-22 15:25:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:25,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:25:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:25,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:25:25,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065943514] [2021-11-22 15:25:25,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065943514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:25:25,690 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:25:25,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-22 15:25:25,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051956777] [2021-11-22 15:25:25,691 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:25:25,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:25:25,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:25:25,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:25:25,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:25:25,692 INFO L87 Difference]: Start difference. First operand 3802 states and 5186 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:25:37,043 INFO L93 Difference]: Finished difference Result 6218 states and 8419 transitions. [2021-11-22 15:25:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:25:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-22 15:25:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:25:37,051 INFO L225 Difference]: With dead ends: 6218 [2021-11-22 15:25:37,051 INFO L226 Difference]: Without dead ends: 6218 [2021-11-22 15:25:37,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:25:37,052 INFO L933 BasicCegarLoop]: 1348 mSDtfsCounter, 1864 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 4260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 5930 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:25:37,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1864 Valid, 5930 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4260 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-11-22 15:25:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2021-11-22 15:25:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 3801. [2021-11-22 15:25:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3022 states have (on average 1.715089344804765) internal successors, (5183), 3800 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5183 transitions. [2021-11-22 15:25:37,109 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5183 transitions. Word has length 68 [2021-11-22 15:25:37,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:25:37,110 INFO L470 AbstractCegarLoop]: Abstraction has 3801 states and 5183 transitions. [2021-11-22 15:25:37,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5183 transitions. [2021-11-22 15:25:37,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-22 15:25:37,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:25:37,112 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] [2021-11-22 15:25:37,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-22 15:25:37,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:25:37,325 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:25:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:25:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-22 15:25:37,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:25:37,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327777810] [2021-11-22 15:25:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:25:37,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:25:37,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:25:37,328 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:25:37,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-22 15:25:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:25:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:25:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:25:37,718 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 [2021-11-22 15:25:37,740 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 [2021-11-22 15:25:37,788 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 [2021-11-22 15:25:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:37,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:25:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:37,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:25:37,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327777810] [2021-11-22 15:25:37,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327777810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:25:37,969 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:25:37,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-22 15:25:37,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026641169] [2021-11-22 15:25:37,969 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:25:37,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:25:37,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:25:37,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:25:37,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:25:37,971 INFO L87 Difference]: Start difference. First operand 3801 states and 5183 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:25:49,331 INFO L93 Difference]: Finished difference Result 6210 states and 8405 transitions. [2021-11-22 15:25:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:25:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-22 15:25:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:25:49,341 INFO L225 Difference]: With dead ends: 6210 [2021-11-22 15:25:49,342 INFO L226 Difference]: Without dead ends: 6210 [2021-11-22 15:25:49,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:25:49,343 INFO L933 BasicCegarLoop]: 1347 mSDtfsCounter, 1864 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 4256 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 5929 SdHoareTripleChecker+Invalid, 4278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:25:49,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1864 Valid, 5929 Invalid, 4278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4256 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-11-22 15:25:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6210 states. [2021-11-22 15:25:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6210 to 3800. [2021-11-22 15:25:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3022 states have (on average 1.714427531436135) internal successors, (5181), 3799 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 5181 transitions. [2021-11-22 15:25:49,398 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 5181 transitions. Word has length 68 [2021-11-22 15:25:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:25:49,398 INFO L470 AbstractCegarLoop]: Abstraction has 3800 states and 5181 transitions. [2021-11-22 15:25:49,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 5181 transitions. [2021-11-22 15:25:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 15:25:49,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:25:49,399 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] [2021-11-22 15:25:49,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-22 15:25:49,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:25:49,619 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:25:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:25:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-22 15:25:49,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:25:49,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932290715] [2021-11-22 15:25:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:25:49,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:25:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:25:49,622 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:25:49,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-22 15:25:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:25:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:25:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:25:49,985 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 [2021-11-22 15:25:50,018 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 [2021-11-22 15:25:50,033 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 [2021-11-22 15:25:50,112 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 [2021-11-22 15:25:50,117 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 [2021-11-22 15:25:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:50,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:25:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:25:50,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:25:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932290715] [2021-11-22 15:25:50,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932290715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:25:50,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:25:50,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-22 15:25:50,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117974022] [2021-11-22 15:25:50,682 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:25:50,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 15:25:50,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:25:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 15:25:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:25:50,684 INFO L87 Difference]: Start difference. First operand 3800 states and 5181 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:26:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:26:27,730 INFO L93 Difference]: Finished difference Result 5699 states and 7685 transitions. [2021-11-22 15:26:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:26:27,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2021-11-22 15:26:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:26:27,736 INFO L225 Difference]: With dead ends: 5699 [2021-11-22 15:26:27,736 INFO L226 Difference]: Without dead ends: 5699 [2021-11-22 15:26:27,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:26:27,737 INFO L933 BasicCegarLoop]: 1310 mSDtfsCounter, 1873 mSDsluCounter, 7802 mSDsCounter, 0 mSdLazyCounter, 6818 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 9112 SdHoareTripleChecker+Invalid, 6835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 6818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:26:27,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1873 Valid, 9112 Invalid, 6835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 6818 Invalid, 0 Unknown, 0 Unchecked, 36.6s Time] [2021-11-22 15:26:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2021-11-22 15:26:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 3799. [2021-11-22 15:26:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3022 states have (on average 1.7134348113831899) internal successors, (5178), 3798 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:26:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5178 transitions. [2021-11-22 15:26:27,785 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5178 transitions. Word has length 69 [2021-11-22 15:26:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:26:27,785 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 5178 transitions. [2021-11-22 15:26:27,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:26:27,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5178 transitions. [2021-11-22 15:26:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 15:26:27,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:26:27,786 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] [2021-11-22 15:26:27,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-22 15:26:27,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:26:27,987 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:26:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:26:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-22 15:26:27,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:26:27,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901128247] [2021-11-22 15:26:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:26:27,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:26:27,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:26:27,989 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:26:27,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-22 15:26:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:26:28,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:26:28,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:26:28,312 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 [2021-11-22 15:26:28,339 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 [2021-11-22 15:26:28,351 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 [2021-11-22 15:26:28,442 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 [2021-11-22 15:26:28,447 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 [2021-11-22 15:26:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:26:28,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:26:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:26:28,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:26:28,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901128247] [2021-11-22 15:26:28,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901128247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:26:28,940 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:26:28,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-22 15:26:28,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620934632] [2021-11-22 15:26:28,940 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:26:28,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 15:26:28,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:26:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 15:26:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:26:28,941 INFO L87 Difference]: Start difference. First operand 3799 states and 5178 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:27:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:27:01,588 INFO L93 Difference]: Finished difference Result 5694 states and 7676 transitions. [2021-11-22 15:27:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:27:01,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2021-11-22 15:27:01,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:27:01,595 INFO L225 Difference]: With dead ends: 5694 [2021-11-22 15:27:01,595 INFO L226 Difference]: Without dead ends: 5694 [2021-11-22 15:27:01,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:27:01,596 INFO L933 BasicCegarLoop]: 1309 mSDtfsCounter, 1879 mSDsluCounter, 6622 mSDsCounter, 0 mSdLazyCounter, 5893 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1879 SdHoareTripleChecker+Valid, 7931 SdHoareTripleChecker+Invalid, 5911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:27:01,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1879 Valid, 7931 Invalid, 5911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5893 Invalid, 0 Unknown, 0 Unchecked, 32.3s Time] [2021-11-22 15:27:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-11-22 15:27:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 3798. [2021-11-22 15:27:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3022 states have (on average 1.7127729980145598) internal successors, (5176), 3797 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:27:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 5176 transitions. [2021-11-22 15:27:01,643 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 5176 transitions. Word has length 69 [2021-11-22 15:27:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:27:01,643 INFO L470 AbstractCegarLoop]: Abstraction has 3798 states and 5176 transitions. [2021-11-22 15:27:01,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:27:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 5176 transitions. [2021-11-22 15:27:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 15:27:01,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:27:01,644 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] [2021-11-22 15:27:01,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-22 15:27:01,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:27:01,860 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:27:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:27:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-22 15:27:01,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:27:01,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242741189] [2021-11-22 15:27:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:27:01,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:27:01,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:27:01,862 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:27:01,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-22 15:27:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:27:02,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:27:02,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:27:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:27:02,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:27:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:27:02,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:27:02,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242741189] [2021-11-22 15:27:02,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242741189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:27:02,405 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:27:02,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 15:27:02,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425113272] [2021-11-22 15:27:02,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:27:02,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:27:02,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:27:02,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:27:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:27:02,406 INFO L87 Difference]: Start difference. First operand 3798 states and 5176 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:27:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:27:02,751 INFO L93 Difference]: Finished difference Result 6959 states and 9406 transitions. [2021-11-22 15:27:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:27:02,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 73 [2021-11-22 15:27:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:27:02,759 INFO L225 Difference]: With dead ends: 6959 [2021-11-22 15:27:02,759 INFO L226 Difference]: Without dead ends: 6959 [2021-11-22 15:27:02,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:27:02,760 INFO L933 BasicCegarLoop]: 2542 mSDtfsCounter, 1997 mSDsluCounter, 9392 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 11934 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:27:02,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 11934 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:27:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2021-11-22 15:27:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 3813. [2021-11-22 15:27:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3037 states have (on average 1.7092525518603885) internal successors, (5191), 3812 states have internal predecessors, (5191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:27:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5191 transitions. [2021-11-22 15:27:02,853 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5191 transitions. Word has length 73 [2021-11-22 15:27:02,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:27:02,854 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5191 transitions. [2021-11-22 15:27:02,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:27:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5191 transitions. [2021-11-22 15:27:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 15:27:02,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:27:02,855 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] [2021-11-22 15:27:02,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-22 15:27:03,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:27:03,073 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:27:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:27:03,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-22 15:27:03,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:27:03,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419852137] [2021-11-22 15:27:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:27:03,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:27:03,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:27:03,075 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:27:03,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-22 15:27:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:27:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:27:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:27:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:27:03,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:27:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:27:03,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:27:03,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419852137] [2021-11-22 15:27:03,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419852137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:27:03,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:27:03,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-22 15:27:03,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765910524] [2021-11-22 15:27:03,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:27:03,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 15:27:03,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:27:03,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 15:27:03,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:27:03,760 INFO L87 Difference]: Start difference. First operand 3813 states and 5191 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:27:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:27:04,498 INFO L93 Difference]: Finished difference Result 6253 states and 8439 transitions. [2021-11-22 15:27:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 15:27:04,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 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 75 [2021-11-22 15:27:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:27:04,506 INFO L225 Difference]: With dead ends: 6253 [2021-11-22 15:27:04,506 INFO L226 Difference]: Without dead ends: 6253 [2021-11-22 15:27:04,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:27:04,507 INFO L933 BasicCegarLoop]: 2124 mSDtfsCounter, 1667 mSDsluCounter, 9705 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 11829 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:27:04,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 11829 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 15:27:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-11-22 15:27:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3843. [2021-11-22 15:27:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3067 states have (on average 1.7023149657645908) internal successors, (5221), 3842 states have internal predecessors, (5221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:27:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 5221 transitions. [2021-11-22 15:27:04,591 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 5221 transitions. Word has length 75 [2021-11-22 15:27:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:27:04,591 INFO L470 AbstractCegarLoop]: Abstraction has 3843 states and 5221 transitions. [2021-11-22 15:27:04,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:27:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 5221 transitions. [2021-11-22 15:27:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 15:27:04,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:27:04,592 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] [2021-11-22 15:27:04,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-22 15:27:04,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:27:04,801 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-22 15:27:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:27:04,802 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-22 15:27:04,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:27:04,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668893683] [2021-11-22 15:27:04,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:27:04,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:27:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:27:04,804 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:27:04,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06d205cb-b474-4032-9748-69f4b096782f/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-22 15:27:05,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-22 15:27:05,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:27:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:27:05,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:27:05,199 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 [2021-11-22 15:27:05,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:27:05,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:27:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:27:05,312 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-22 15:27:05,312 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 [2021-11-22 15:27:05,463 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 15:27:05,463 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 16 treesize of output 16 [2021-11-22 15:27:05,718 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-22 15:27:05,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-22 15:27:11,463 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-22 15:27:11,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-22 15:27:21,475 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-22 15:27:21,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-22 15:27:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 15:27:21,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:27:34,804 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~user~0#1.base_332| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_332|))) (forall ((|ULTIMATE.start_main_#t~mem11#1| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem9#1| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem10#1| (_ BitVec 32)) (|ULTIMATE.start_main_~user~0#1.offset| (_ BitVec 32))) (bvslt (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_main_~user~0#1.base_332| (let ((.cse1 (bvmul |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|))) (store (store (store (store (store (store (store (store (select |c_#memory_int| |v_ULTIMATE.start_main_~user~0#1.base_332|) |ULTIMATE.start_main_~user~0#1.offset| ((_ extract 7 0) |ULTIMATE.start_main_#t~mem9#1|)) (bvadd (_ bv1 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 15 8) |ULTIMATE.start_main_#t~mem9#1|)) (bvadd (_ bv2 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 23 16) |ULTIMATE.start_main_#t~mem9#1|)) (bvadd (_ bv3 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 31 24) |ULTIMATE.start_main_#t~mem9#1|)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 7 0) .cse1)) (bvadd (_ bv5 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 15 8) .cse1)) (bvadd (_ bv6 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 23 16) .cse1)) (bvadd (_ bv7 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 31 24) .cse1)))) |c_ULTIMATE.start_main_~#i~0#1.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_ULTIMATE.start_main_~#i~0#1.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~#i~0#1.offset|))) (select .cse0 (bvadd (_ bv1 32) |c_ULTIMATE.start_main_~#i~0#1.offset|))) (select .cse0 |c_ULTIMATE.start_main_~#i~0#1.offset|))) (_ bv10 32))))) is different from false