./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:21,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:21,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:21,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:21,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:21,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:21,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:21,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:21,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:21,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:21,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:21,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:21,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:21,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:21,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:21,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:21,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:21,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:21,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:21,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:21,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:21,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:21,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:21,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:21,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:21,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:21,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:21,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:21,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:21,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:21,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:21,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:21,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:21,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:21,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:21,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:21,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:21,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:21,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:21,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:21,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:21,324 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:42:21,351 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:21,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:21,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:21,352 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:21,353 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:21,353 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:21,353 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:42:21,353 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:21,354 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:21,354 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:42:21,354 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:42:21,354 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:21,355 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:42:21,355 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:42:21,355 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:42:21,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:21,356 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:21,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:42:21,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:21,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:21,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:21,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:21,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:21,358 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:21,358 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:21,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:21,359 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:21,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:21,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:21,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:21,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:21,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:21,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:21,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:21,361 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:42:21,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:42:21,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:21,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:21,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:21,362 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 [2021-11-07 01:42:21,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:21,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:21,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:21,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:21,689 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:21,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-07 01:42:21,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data/0982fbb86/49ebf7eae36b461b977f8cde1c0dc7e3/FLAG5a698e19f [2021-11-07 01:42:22,244 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:22,244 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-07 01:42:22,260 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data/0982fbb86/49ebf7eae36b461b977f8cde1c0dc7e3/FLAG5a698e19f [2021-11-07 01:42:22,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data/0982fbb86/49ebf7eae36b461b977f8cde1c0dc7e3 [2021-11-07 01:42:22,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:22,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:22,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:22,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:22,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:22,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:22" (1/1) ... [2021-11-07 01:42:22,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b9d93d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:22, skipping insertion in model container [2021-11-07 01:42:22,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:22" (1/1) ... [2021-11-07 01:42:22,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:22,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:22,896 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-07 01:42:22,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:22,919 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) [2021-11-07 01:42:22,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@634b67fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:22, skipping insertion in model container [2021-11-07 01:42:22,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:22,921 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:42:22,923 INFO L168 Benchmark]: Toolchain (without parser) took 296.36 ms. Allocated memory is still 94.4 MB. Free memory was 58.0 MB in the beginning and 69.3 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:22,924 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 94.4 MB. Free memory was 66.5 MB in the beginning and 66.4 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:42:22,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.19 ms. Allocated memory is still 94.4 MB. Free memory was 57.7 MB in the beginning and 69.3 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:22,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 94.4 MB. Free memory was 66.5 MB in the beginning and 66.4 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.19 ms. Allocated memory is still 94.4 MB. Free memory was 57.7 MB in the beginning and 69.3 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 151]: 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_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:25,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:25,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:25,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:25,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:25,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:25,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:25,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:25,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:25,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:25,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:25,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:25,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:25,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:25,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:25,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:25,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:25,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:25,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:25,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:25,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:25,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:25,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:25,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:25,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:25,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:25,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:25,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:25,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:25,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:25,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:25,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:25,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:25,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:25,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:25,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:25,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:25,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:25,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:25,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:25,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:25,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:42:25,738 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:25,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:25,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:25,741 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:25,741 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:25,741 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:25,741 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:25,742 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:25,743 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:25,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:25,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:25,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:25,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:25,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:25,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:25,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:25,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:25,747 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:42:25,748 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:42:25,748 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:25,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:25,748 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:25,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:25,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:25,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:42:25,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:25,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:25,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:25,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:25,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:25,751 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:42:25,751 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:25,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:25,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:25,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:25,752 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_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 [2021-11-07 01:42:26,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:26,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:26,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:26,212 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:26,213 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:26,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-07 01:42:26,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data/0b592d909/768397ca61ad48f49d90b54a7fd41767/FLAG2ae3d71d7 [2021-11-07 01:42:26,988 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:26,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-07 01:42:27,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data/0b592d909/768397ca61ad48f49d90b54a7fd41767/FLAG2ae3d71d7 [2021-11-07 01:42:27,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/data/0b592d909/768397ca61ad48f49d90b54a7fd41767 [2021-11-07 01:42:27,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:27,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:27,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:27,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:27,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:27,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46662a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27, skipping insertion in model container [2021-11-07 01:42:27,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:27,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:27,622 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-07 01:42:27,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:27,649 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:42:27,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:27,694 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-07 01:42:27,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:27,716 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:42:27,750 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-07 01:42:27,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:27,777 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:42:27,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27 WrapperNode [2021-11-07 01:42:27,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:27,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:27,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:42:27,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:42:27,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:27,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:42:27,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:42:27,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:42:27,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:42:27,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:42:27,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:42:27,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:42:27,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (1/1) ... [2021-11-07 01:42:27,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:27,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:27,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:42:27,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:42:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:42:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:42:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:42:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 01:42:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 01:42:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 01:42:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 01:42:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-07 01:42:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-07 01:42:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:42:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:42:28,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:42:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:42:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:42:28,038 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 01:42:28,879 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:42:28,879 INFO L299 CfgBuilder]: Removed 46 assume(true) statements. [2021-11-07 01:42:28,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:28 BoogieIcfgContainer [2021-11-07 01:42:28,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:42:28,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:42:28,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:42:28,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:42:28,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:27" (1/3) ... [2021-11-07 01:42:28,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5873d69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:28, skipping insertion in model container [2021-11-07 01:42:28,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:27" (2/3) ... [2021-11-07 01:42:28,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5873d69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:28, skipping insertion in model container [2021-11-07 01:42:28,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:28" (3/3) ... [2021-11-07 01:42:28,893 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2021-11-07 01:42:28,899 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 01:42:28,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:42:28,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:42:28,900 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 01:42:28,998 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:28,998 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:28,999 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:28,999 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:28,999 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,001 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,001 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,009 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,010 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,011 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,011 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,011 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,011 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,011 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,012 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,012 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,012 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,012 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,013 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,013 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,013 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,013 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,014 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,014 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,015 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,015 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,015 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,015 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,017 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,017 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,017 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,018 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,018 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,019 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,019 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,019 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,020 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,020 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,020 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,020 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,020 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,021 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,021 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,022 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,022 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,022 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,022 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,023 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,023 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,023 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,023 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,024 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,024 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,025 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,026 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,030 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,030 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,031 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,032 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,032 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,033 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,033 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,034 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,034 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,039 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,040 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,040 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,041 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,041 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,042 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,043 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,043 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,043 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,043 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,044 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,044 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,044 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,044 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,044 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,045 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,045 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,045 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,045 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,046 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,046 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,046 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,046 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,046 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,047 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,047 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,048 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,048 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,048 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,049 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,049 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,049 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,049 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,050 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,051 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,051 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,051 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,051 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,051 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,053 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,053 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,053 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,053 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,053 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,054 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,054 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,054 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,054 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,055 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,055 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,055 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,055 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,078 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,078 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,078 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,081 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,081 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,087 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,087 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,087 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,087 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,088 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,088 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,088 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,089 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,089 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,089 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,089 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,090 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,091 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,092 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,092 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,092 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,093 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,093 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,093 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,093 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,093 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,094 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,097 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite24| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,097 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite24| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,097 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,097 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,097 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,098 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,098 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite24| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,098 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite24| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,099 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,106 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,106 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,107 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,107 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,107 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite24| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,107 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite24| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,107 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,108 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,108 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,108 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,108 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,108 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,109 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret23| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,109 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret23| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,109 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,109 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,109 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,110 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,110 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,110 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,110 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,111 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,111 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,111 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,111 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,111 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,112 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,112 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,112 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,112 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,113 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,113 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,113 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,113 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,113 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,113 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,114 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,114 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,114 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,114 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,114 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,115 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,115 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,115 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,115 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,116 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,116 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,116 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,116 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,116 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,116 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,117 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,117 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,117 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,117 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,117 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,118 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,118 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,118 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,118 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,118 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,119 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,119 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,119 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,119 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,119 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,120 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,120 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,120 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,120 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,120 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,120 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,121 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,121 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,121 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,121 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,121 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,121 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,122 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,122 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,122 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,122 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,122 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,123 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret23| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,123 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,129 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret23| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,130 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,130 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,130 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret23| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,130 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite24| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret23| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite24| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,133 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,133 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,133 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,133 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,136 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,137 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite25| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,137 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite25| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,137 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite25| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,137 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite25| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,137 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite25| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,138 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite25| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,138 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite25| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,138 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite25| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,142 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite26| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,142 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite26| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,142 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite26| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,142 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite26| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,143 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite26| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,143 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite26| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,143 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite26| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,143 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite26| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,143 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet27| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,144 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet27| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,144 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet27| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,144 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet27| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,145 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,146 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,146 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet27| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,146 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet27| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,146 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet27| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,146 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet27| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,147 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,147 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,147 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,147 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,147 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,147 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,148 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,148 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,148 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,148 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,148 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,148 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,149 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,149 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,149 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,149 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,149 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,149 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,150 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,150 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,150 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,150 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,150 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,151 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,151 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,151 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,151 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,151 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,151 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem28| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,152 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem28| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,152 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,152 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,152 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,152 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,153 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem28| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,153 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem28| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,153 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,153 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,153 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,153 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,154 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,154 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,154 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem28| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,154 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem28| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,154 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,154 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,155 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,155 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,155 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,155 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,155 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,155 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,156 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,156 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,157 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,157 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,158 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,158 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,158 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite29| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,158 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite29| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,158 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite29| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,158 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite29| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,159 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,159 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,159 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,159 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,159 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,159 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,160 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite29| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,160 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite29| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,160 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,160 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,160 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite29| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,160 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite29| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,161 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,161 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,161 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,161 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,161 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,162 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,162 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,162 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,162 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,162 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,162 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,163 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,163 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,163 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,163 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,163 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,163 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,164 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,164 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,164 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,164 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,164 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,164 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,165 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,165 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,165 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,165 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,165 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,166 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,166 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,166 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,166 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,166 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,166 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,167 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,167 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,167 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,167 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,167 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,167 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,168 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,168 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,168 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,168 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,168 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,168 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,169 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,169 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,169 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,169 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,169 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,169 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,170 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,170 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,170 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,170 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,170 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,171 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,171 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,171 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,171 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,171 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,171 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,181 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,181 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,181 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,182 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,182 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,186 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,186 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,187 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,187 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,187 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,187 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,188 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite24| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,188 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,188 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,188 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,188 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,189 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,189 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,190 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,190 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret23| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,190 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,191 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,191 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,191 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,191 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,200 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite29| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,200 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,201 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,201 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem28| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,201 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,201 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,202 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,202 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,202 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,202 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,202 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet27| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,203 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,203 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,203 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,203 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite25| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,204 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite26| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,204 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,204 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,204 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,204 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ite32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,209 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,209 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,209 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,210 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,212 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,212 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,212 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,212 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,212 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,213 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,213 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,213 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:42:29,223 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-07 01:42:29,295 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:42:29,306 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:42:29,306 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 01:42:29,342 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 01:42:29,356 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 370 places, 404 transitions, 832 flow [2021-11-07 01:42:29,359 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 370 places, 404 transitions, 832 flow [2021-11-07 01:42:29,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 370 places, 404 transitions, 832 flow [2021-11-07 01:42:29,646 INFO L129 PetriNetUnfolder]: 44/401 cut-off events. [2021-11-07 01:42:29,646 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-07 01:42:29,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 401 events. 44/401 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1134 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 287. Up to 2 conditions per place. [2021-11-07 01:42:29,708 INFO L116 LiptonReduction]: Number of co-enabled transitions 53934 [2021-11-07 01:43:09,977 INFO L131 LiptonReduction]: Checked pairs total: 48258 [2021-11-07 01:43:09,978 INFO L133 LiptonReduction]: Total number of compositions: 500 [2021-11-07 01:43:09,998 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 28 transitions, 80 flow [2021-11-07 01:43:10,040 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:43:10,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:10,063 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:10,064 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1889936408, now seen corresponding path program 1 times [2021-11-07 01:43:10,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:10,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174601762] [2021-11-07 01:43:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:10,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:10,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:10,097 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:10,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:43:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:10,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:10,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:10,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:10,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:10,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174601762] [2021-11-07 01:43:10,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174601762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:10,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:10,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:43:10,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695158987] [2021-11-07 01:43:10,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:10,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:10,724 INFO L87 Difference]: Start difference. First operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-11-07 01:43:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:10,785 INFO L93 Difference]: Finished difference Result 109 states and 329 transitions. [2021-11-07 01:43:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:10,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2021-11-07 01:43:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:10,803 INFO L225 Difference]: With dead ends: 109 [2021-11-07 01:43:10,804 INFO L226 Difference]: Without dead ends: 109 [2021-11-07 01:43:10,805 INFO L786 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 [2021-11-07 01:43:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-07 01:43:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-07 01:43:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 3.0462962962962963) internal successors, (329), 108 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 329 transitions. [2021-11-07 01:43:10,892 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 329 transitions. Word has length 20 [2021-11-07 01:43:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:10,893 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 329 transitions. [2021-11-07 01:43:10,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-11-07 01:43:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 329 transitions. [2021-11-07 01:43:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:43:10,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:10,897 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:10,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:11,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:11,099 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 825910184, now seen corresponding path program 1 times [2021-11-07 01:43:11,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:11,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563785535] [2021-11-07 01:43:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:11,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:11,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:11,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:11,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:43:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:11,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:11,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:11,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:11,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:11,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563785535] [2021-11-07 01:43:11,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563785535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:11,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [476871468] [2021-11-07 01:43:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:11,792 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:11,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:11,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:11,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 01:43:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:12,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:12,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [476871468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:12,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038099433] [2021-11-07 01:43:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:12,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:43:12,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:12,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:43:12,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:43:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:12,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:12,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038099433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:12,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:43:12,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-07 01:43:12,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816026044] [2021-11-07 01:43:12,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:12,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:12,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:12,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:12,882 INFO L87 Difference]: Start difference. First operand 109 states and 329 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:12,998 INFO L93 Difference]: Finished difference Result 110 states and 330 transitions. [2021-11-07 01:43:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:13,000 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 01:43:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:13,004 INFO L225 Difference]: With dead ends: 110 [2021-11-07 01:43:13,004 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 01:43:13,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 01:43:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-07 01:43:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 3.0275229357798166) internal successors, (330), 109 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 330 transitions. [2021-11-07 01:43:13,025 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 330 transitions. Word has length 22 [2021-11-07 01:43:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:13,026 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 330 transitions. [2021-11-07 01:43:13,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 330 transitions. [2021-11-07 01:43:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:43:13,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:13,029 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:13,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:13,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:13,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:13,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:13,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1452888166, now seen corresponding path program 2 times [2021-11-07 01:43:13,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:13,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245103169] [2021-11-07 01:43:13,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:43:13,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:13,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:13,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:43:13,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:43:13,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:13,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:14,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:16,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:16,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245103169] [2021-11-07 01:43:16,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245103169] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:16,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:16,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:43:16,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957338403] [2021-11-07 01:43:16,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:43:16,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:16,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:43:16,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:43:16,887 INFO L87 Difference]: Start difference. First operand 110 states and 330 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:17,954 INFO L93 Difference]: Finished difference Result 199 states and 589 transitions. [2021-11-07 01:43:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:43:17,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 23 [2021-11-07 01:43:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:17,959 INFO L225 Difference]: With dead ends: 199 [2021-11-07 01:43:17,960 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 01:43:17,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 01:43:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 150. [2021-11-07 01:43:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.0) internal successors, (447), 149 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 447 transitions. [2021-11-07 01:43:17,986 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 447 transitions. Word has length 23 [2021-11-07 01:43:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:17,987 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 447 transitions. [2021-11-07 01:43:17,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 447 transitions. [2021-11-07 01:43:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:43:17,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:17,991 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:18,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:18,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:18,207 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:18,208 INFO L85 PathProgramCache]: Analyzing trace with hash -105427922, now seen corresponding path program 3 times [2021-11-07 01:43:18,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:18,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627804990] [2021-11-07 01:43:18,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:43:18,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:18,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:18,211 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:18,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:43:18,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-07 01:43:18,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:18,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:19,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:23,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:23,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627804990] [2021-11-07 01:43:23,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627804990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:23,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:23,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:43:23,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260304732] [2021-11-07 01:43:23,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:43:23,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:23,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:43:23,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:23,044 INFO L87 Difference]: Start difference. First operand 150 states and 447 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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) [2021-11-07 01:43:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:24,150 INFO L93 Difference]: Finished difference Result 237 states and 697 transitions. [2021-11-07 01:43:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:43:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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 23 [2021-11-07 01:43:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:24,155 INFO L225 Difference]: With dead ends: 237 [2021-11-07 01:43:24,156 INFO L226 Difference]: Without dead ends: 226 [2021-11-07 01:43:24,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-07 01:43:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 166. [2021-11-07 01:43:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.084848484848485) internal successors, (509), 165 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 509 transitions. [2021-11-07 01:43:24,182 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 509 transitions. Word has length 23 [2021-11-07 01:43:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:24,182 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 509 transitions. [2021-11-07 01:43:24,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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) [2021-11-07 01:43:24,183 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 509 transitions. [2021-11-07 01:43:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:43:24,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:24,186 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:24,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:24,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:24,439 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1505513036, now seen corresponding path program 4 times [2021-11-07 01:43:24,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:24,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525740820] [2021-11-07 01:43:24,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:43:24,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:24,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:24,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:24,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:43:24,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:43:24,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:24,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:25,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:29,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:29,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525740820] [2021-11-07 01:43:29,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525740820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:29,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:29,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:43:29,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267444321] [2021-11-07 01:43:29,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:43:29,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:43:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:29,236 INFO L87 Difference]: Start difference. First operand 166 states and 509 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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) [2021-11-07 01:43:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:30,194 INFO L93 Difference]: Finished difference Result 225 states and 674 transitions. [2021-11-07 01:43:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:43:30,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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 23 [2021-11-07 01:43:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:30,198 INFO L225 Difference]: With dead ends: 225 [2021-11-07 01:43:30,199 INFO L226 Difference]: Without dead ends: 214 [2021-11-07 01:43:30,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-07 01:43:30,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 166. [2021-11-07 01:43:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.084848484848485) internal successors, (509), 165 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 509 transitions. [2021-11-07 01:43:30,245 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 509 transitions. Word has length 23 [2021-11-07 01:43:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:30,246 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 509 transitions. [2021-11-07 01:43:30,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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) [2021-11-07 01:43:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 509 transitions. [2021-11-07 01:43:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:43:30,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:30,249 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:30,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:30,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:30,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:30,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:30,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1586234526, now seen corresponding path program 5 times [2021-11-07 01:43:30,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:30,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510151275] [2021-11-07 01:43:30,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:43:30,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:30,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:30,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:30,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:43:30,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:43:30,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:30,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:30,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:31,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:33,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:33,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510151275] [2021-11-07 01:43:33,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510151275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:33,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:33,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:43:33,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306735726] [2021-11-07 01:43:33,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:43:33,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:43:33,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:43:33,009 INFO L87 Difference]: Start difference. First operand 166 states and 509 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:33,958 INFO L93 Difference]: Finished difference Result 239 states and 722 transitions. [2021-11-07 01:43:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:43:33,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 23 [2021-11-07 01:43:33,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:33,962 INFO L225 Difference]: With dead ends: 239 [2021-11-07 01:43:33,963 INFO L226 Difference]: Without dead ends: 228 [2021-11-07 01:43:33,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-07 01:43:33,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 182. [2021-11-07 01:43:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 3.110497237569061) internal successors, (563), 181 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 563 transitions. [2021-11-07 01:43:33,979 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 563 transitions. Word has length 23 [2021-11-07 01:43:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:33,980 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 563 transitions. [2021-11-07 01:43:33,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 563 transitions. [2021-11-07 01:43:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:43:33,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:33,988 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:34,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:34,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:34,210 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:34,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:34,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1876790280, now seen corresponding path program 6 times [2021-11-07 01:43:34,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:34,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235306117] [2021-11-07 01:43:34,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:43:34,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:34,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:34,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:34,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:43:34,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-11-07 01:43:34,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:34,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:35,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:38,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:38,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235306117] [2021-11-07 01:43:38,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235306117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:38,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:43:38,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896742837] [2021-11-07 01:43:38,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:43:38,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:43:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:38,781 INFO L87 Difference]: Start difference. First operand 182 states and 563 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:39,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:39,817 INFO L93 Difference]: Finished difference Result 277 states and 832 transitions. [2021-11-07 01:43:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:43:39,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 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 23 [2021-11-07 01:43:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:39,822 INFO L225 Difference]: With dead ends: 277 [2021-11-07 01:43:39,822 INFO L226 Difference]: Without dead ends: 266 [2021-11-07 01:43:39,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-07 01:43:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 190. [2021-11-07 01:43:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 3.2063492063492065) internal successors, (606), 189 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 606 transitions. [2021-11-07 01:43:39,839 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 606 transitions. Word has length 23 [2021-11-07 01:43:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:39,839 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 606 transitions. [2021-11-07 01:43:39,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 606 transitions. [2021-11-07 01:43:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:43:39,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:39,842 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:39,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:40,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:40,058 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash -807236058, now seen corresponding path program 7 times [2021-11-07 01:43:40,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:40,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704944207] [2021-11-07 01:43:40,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:43:40,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:40,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:40,063 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:40,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:43:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:40,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:41,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:44,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:44,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704944207] [2021-11-07 01:43:44,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704944207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:44,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:44,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:43:44,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126409567] [2021-11-07 01:43:44,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:43:44,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:44,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:43:44,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:44,498 INFO L87 Difference]: Start difference. First operand 190 states and 606 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:45,484 INFO L93 Difference]: Finished difference Result 257 states and 790 transitions. [2021-11-07 01:43:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:43:45,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 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 23 [2021-11-07 01:43:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:45,487 INFO L225 Difference]: With dead ends: 257 [2021-11-07 01:43:45,487 INFO L226 Difference]: Without dead ends: 246 [2021-11-07 01:43:45,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-07 01:43:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 182. [2021-11-07 01:43:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 3.110497237569061) internal successors, (563), 181 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 563 transitions. [2021-11-07 01:43:45,501 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 563 transitions. Word has length 23 [2021-11-07 01:43:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:45,501 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 563 transitions. [2021-11-07 01:43:45,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 563 transitions. [2021-11-07 01:43:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:43:45,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:45,504 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:45,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:45,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:45,721 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:45,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1228611251, now seen corresponding path program 1 times [2021-11-07 01:43:45,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:45,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017078329] [2021-11-07 01:43:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:45,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:45,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:45,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:43:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:46,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:46,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:47,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:47,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:47,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017078329] [2021-11-07 01:43:47,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017078329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:47,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:47,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 01:43:47,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004466694] [2021-11-07 01:43:47,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:43:47,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:43:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:43:47,784 INFO L87 Difference]: Start difference. First operand 182 states and 563 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:49,334 INFO L93 Difference]: Finished difference Result 278 states and 796 transitions. [2021-11-07 01:43:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:43:49,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:43:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:49,338 INFO L225 Difference]: With dead ends: 278 [2021-11-07 01:43:49,338 INFO L226 Difference]: Without dead ends: 272 [2021-11-07 01:43:49,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:43:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-07 01:43:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 196. [2021-11-07 01:43:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 3.076923076923077) internal successors, (600), 195 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 600 transitions. [2021-11-07 01:43:49,354 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 600 transitions. Word has length 24 [2021-11-07 01:43:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:49,354 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 600 transitions. [2021-11-07 01:43:49,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 600 transitions. [2021-11-07 01:43:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:43:49,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:49,356 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:49,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:43:49,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:49,574 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1916450991, now seen corresponding path program 2 times [2021-11-07 01:43:49,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:49,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65851650] [2021-11-07 01:43:49,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:43:49,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:49,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:49,577 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:49,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:43:50,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:43:50,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:50,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:50,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:51,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:51,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:51,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65851650] [2021-11-07 01:43:51,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65851650] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:43:51,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:43:51,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:43:51,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092371033] [2021-11-07 01:43:51,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:43:51,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:43:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:43:51,772 INFO L87 Difference]: Start difference. First operand 196 states and 600 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:43:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:52,487 INFO L93 Difference]: Finished difference Result 276 states and 799 transitions. [2021-11-07 01:43:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:52,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:43:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:52,499 INFO L225 Difference]: With dead ends: 276 [2021-11-07 01:43:52,499 INFO L226 Difference]: Without dead ends: 276 [2021-11-07 01:43:52,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:43:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-07 01:43:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 200. [2021-11-07 01:43:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 3.0653266331658293) internal successors, (610), 199 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 610 transitions. [2021-11-07 01:43:52,515 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 610 transitions. Word has length 24 [2021-11-07 01:43:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:52,515 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 610 transitions. [2021-11-07 01:43:52,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:43:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 610 transitions. [2021-11-07 01:43:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:43:52,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:52,518 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:52,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:52,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:52,731 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2037540403, now seen corresponding path program 3 times [2021-11-07 01:43:52,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:52,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155288651] [2021-11-07 01:43:52,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:43:52,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:52,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:52,733 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:52,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:43:53,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:43:53,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:53,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:53,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:53,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:54,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:54,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155288651] [2021-11-07 01:43:54,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155288651] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:43:54,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:43:54,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-07 01:43:54,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027516159] [2021-11-07 01:43:54,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:43:54,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:43:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:54,502 INFO L87 Difference]: Start difference. First operand 200 states and 610 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:43:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:55,189 INFO L93 Difference]: Finished difference Result 266 states and 787 transitions. [2021-11-07 01:43:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:43:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:55,195 INFO L225 Difference]: With dead ends: 266 [2021-11-07 01:43:55,195 INFO L226 Difference]: Without dead ends: 266 [2021-11-07 01:43:55,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:43:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-07 01:43:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 194. [2021-11-07 01:43:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 3.0725388601036268) internal successors, (593), 193 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 593 transitions. [2021-11-07 01:43:55,209 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 593 transitions. Word has length 24 [2021-11-07 01:43:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:55,210 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 593 transitions. [2021-11-07 01:43:55,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:43:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 593 transitions. [2021-11-07 01:43:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:43:55,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:55,212 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:55,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:55,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:55,427 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1759576601, now seen corresponding path program 4 times [2021-11-07 01:43:55,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:55,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544291299] [2021-11-07 01:43:55,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:43:55,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:55,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:55,429 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:55,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:43:56,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:43:56,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:56,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:56,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:57,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:57,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544291299] [2021-11-07 01:43:57,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544291299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:57,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:57,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-07 01:43:57,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859699708] [2021-11-07 01:43:57,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:43:57,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:43:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:57,279 INFO L87 Difference]: Start difference. First operand 194 states and 593 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:58,305 INFO L93 Difference]: Finished difference Result 276 states and 798 transitions. [2021-11-07 01:43:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:58,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:43:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:58,310 INFO L225 Difference]: With dead ends: 276 [2021-11-07 01:43:58,310 INFO L226 Difference]: Without dead ends: 262 [2021-11-07 01:43:58,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:43:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-07 01:43:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 198. [2021-11-07 01:43:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 3.0558375634517767) internal successors, (602), 197 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 602 transitions. [2021-11-07 01:43:58,324 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 602 transitions. Word has length 24 [2021-11-07 01:43:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:58,325 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 602 transitions. [2021-11-07 01:43:58,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 602 transitions. [2021-11-07 01:43:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:43:58,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:58,327 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:58,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:58,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:58,542 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:43:58,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash -715374757, now seen corresponding path program 5 times [2021-11-07 01:43:58,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:58,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783776457] [2021-11-07 01:43:58,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:43:58,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:58,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:58,546 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:58,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:43:59,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:43:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:00,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:00,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:00,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783776457] [2021-11-07 01:44:00,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783776457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:00,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:00,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 01:44:00,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826822985] [2021-11-07 01:44:00,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:44:00,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:44:00,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:00,791 INFO L87 Difference]: Start difference. First operand 198 states and 602 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:02,128 INFO L93 Difference]: Finished difference Result 288 states and 820 transitions. [2021-11-07 01:44:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:44:02,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:44:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:02,133 INFO L225 Difference]: With dead ends: 288 [2021-11-07 01:44:02,134 INFO L226 Difference]: Without dead ends: 282 [2021-11-07 01:44:02,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:44:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-07 01:44:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 208. [2021-11-07 01:44:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 3.028985507246377) internal successors, (627), 207 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 627 transitions. [2021-11-07 01:44:02,149 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 627 transitions. Word has length 24 [2021-11-07 01:44:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:02,150 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 627 transitions. [2021-11-07 01:44:02,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 627 transitions. [2021-11-07 01:44:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:02,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:02,152 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:02,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:02,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:02,372 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash 434530297, now seen corresponding path program 6 times [2021-11-07 01:44:02,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:02,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649795006] [2021-11-07 01:44:02,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:44:02,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:02,374 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:02,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:44:03,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:44:03,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:03,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:04,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:04,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:04,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649795006] [2021-11-07 01:44:04,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649795006] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:04,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:04,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:44:04,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830085639] [2021-11-07 01:44:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:04,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:04,918 INFO L87 Difference]: Start difference. First operand 208 states and 627 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:05,932 INFO L93 Difference]: Finished difference Result 268 states and 791 transitions. [2021-11-07 01:44:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:05,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:05,944 INFO L225 Difference]: With dead ends: 268 [2021-11-07 01:44:05,944 INFO L226 Difference]: Without dead ends: 268 [2021-11-07 01:44:05,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:44:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-07 01:44:05,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 198. [2021-11-07 01:44:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 3.0558375634517767) internal successors, (602), 197 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:05,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 602 transitions. [2021-11-07 01:44:05,959 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 602 transitions. Word has length 24 [2021-11-07 01:44:05,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:05,959 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 602 transitions. [2021-11-07 01:44:05,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 602 transitions. [2021-11-07 01:44:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:05,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:05,962 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:05,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:06,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:06,181 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:06,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:06,182 INFO L85 PathProgramCache]: Analyzing trace with hash -826415810, now seen corresponding path program 1 times [2021-11-07 01:44:06,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:06,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237847016] [2021-11-07 01:44:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:06,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:06,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:06,183 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:06,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:44:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:07,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:07,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:07,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:07,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:07,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237847016] [2021-11-07 01:44:07,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237847016] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:07,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:07,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-07 01:44:07,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101579803] [2021-11-07 01:44:07,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:07,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:07,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:07,912 INFO L87 Difference]: Start difference. First operand 198 states and 602 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:08,648 INFO L93 Difference]: Finished difference Result 278 states and 848 transitions. [2021-11-07 01:44:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:08,655 INFO L225 Difference]: With dead ends: 278 [2021-11-07 01:44:08,655 INFO L226 Difference]: Without dead ends: 278 [2021-11-07 01:44:08,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:44:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-07 01:44:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 206. [2021-11-07 01:44:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 3.0926829268292684) internal successors, (634), 205 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 634 transitions. [2021-11-07 01:44:08,669 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 634 transitions. Word has length 24 [2021-11-07 01:44:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:08,669 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 634 transitions. [2021-11-07 01:44:08,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:08,670 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 634 transitions. [2021-11-07 01:44:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:08,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:08,671 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:08,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:08,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:08,887 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:08,887 INFO L85 PathProgramCache]: Analyzing trace with hash 73421878, now seen corresponding path program 2 times [2021-11-07 01:44:08,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:08,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585614999] [2021-11-07 01:44:08,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:44:08,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:08,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:08,890 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:08,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:44:10,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:44:10,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:10,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:10,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:10,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:11,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:11,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585614999] [2021-11-07 01:44:11,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585614999] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:11,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:11,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:44:11,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732218546] [2021-11-07 01:44:11,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:11,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:11,342 INFO L87 Difference]: Start difference. First operand 206 states and 634 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:12,613 INFO L93 Difference]: Finished difference Result 308 states and 934 transitions. [2021-11-07 01:44:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:12,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:12,618 INFO L225 Difference]: With dead ends: 308 [2021-11-07 01:44:12,618 INFO L226 Difference]: Without dead ends: 308 [2021-11-07 01:44:12,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:44:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-07 01:44:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 210. [2021-11-07 01:44:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 3.138755980861244) internal successors, (656), 209 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 656 transitions. [2021-11-07 01:44:12,634 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 656 transitions. Word has length 24 [2021-11-07 01:44:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:12,634 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 656 transitions. [2021-11-07 01:44:12,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 656 transitions. [2021-11-07 01:44:12,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:12,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:12,636 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:12,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:12,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:12,851 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1784035186, now seen corresponding path program 3 times [2021-11-07 01:44:12,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:12,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522784453] [2021-11-07 01:44:12,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:44:12,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:12,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:12,853 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:12,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:44:14,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:44:14,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:14,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:14,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:14,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:15,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:15,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522784453] [2021-11-07 01:44:15,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522784453] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:15,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:15,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:44:15,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672688017] [2021-11-07 01:44:15,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:15,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:15,457 INFO L87 Difference]: Start difference. First operand 210 states and 656 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:16,514 INFO L93 Difference]: Finished difference Result 292 states and 896 transitions. [2021-11-07 01:44:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:16,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:16,519 INFO L225 Difference]: With dead ends: 292 [2021-11-07 01:44:16,519 INFO L226 Difference]: Without dead ends: 292 [2021-11-07 01:44:16,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:44:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-07 01:44:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 214. [2021-11-07 01:44:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 3.1502347417840375) internal successors, (671), 213 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 671 transitions. [2021-11-07 01:44:16,534 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 671 transitions. Word has length 24 [2021-11-07 01:44:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:16,535 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 671 transitions. [2021-11-07 01:44:16,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 671 transitions. [2021-11-07 01:44:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:16,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:16,537 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:16,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:44:16,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:16,757 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:16,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2053135938, now seen corresponding path program 4 times [2021-11-07 01:44:16,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:16,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548258363] [2021-11-07 01:44:16,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:44:16,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:16,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:16,760 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:16,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:44:17,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:44:17,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:17,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:17,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:18,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:18,878 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:18,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548258363] [2021-11-07 01:44:18,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548258363] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:18,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:18,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-07 01:44:18,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337803728] [2021-11-07 01:44:18,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:18,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:18,880 INFO L87 Difference]: Start difference. First operand 214 states and 671 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:19,708 INFO L93 Difference]: Finished difference Result 324 states and 990 transitions. [2021-11-07 01:44:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:19,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:19,713 INFO L225 Difference]: With dead ends: 324 [2021-11-07 01:44:19,714 INFO L226 Difference]: Without dead ends: 324 [2021-11-07 01:44:19,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:44:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-07 01:44:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 228. [2021-11-07 01:44:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.198237885462555) internal successors, (726), 227 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 726 transitions. [2021-11-07 01:44:19,728 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 726 transitions. Word has length 24 [2021-11-07 01:44:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:19,729 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 726 transitions. [2021-11-07 01:44:19,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 726 transitions. [2021-11-07 01:44:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:19,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:19,731 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:19,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:44:19,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:19,950 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:19,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:19,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2067497330, now seen corresponding path program 5 times [2021-11-07 01:44:19,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:19,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63303090] [2021-11-07 01:44:19,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:44:19,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:19,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:19,952 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:19,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:44:21,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:44:21,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:21,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:21,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:22,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:22,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63303090] [2021-11-07 01:44:22,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63303090] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:22,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:22,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:44:22,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796274850] [2021-11-07 01:44:22,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:22,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:22,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:22,436 INFO L87 Difference]: Start difference. First operand 228 states and 726 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:23,611 INFO L93 Difference]: Finished difference Result 354 states and 1076 transitions. [2021-11-07 01:44:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:23,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:23,616 INFO L225 Difference]: With dead ends: 354 [2021-11-07 01:44:23,617 INFO L226 Difference]: Without dead ends: 354 [2021-11-07 01:44:23,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:44:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-07 01:44:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 232. [2021-11-07 01:44:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.238095238095238) internal successors, (748), 231 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 748 transitions. [2021-11-07 01:44:23,632 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 748 transitions. Word has length 24 [2021-11-07 01:44:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:23,633 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 748 transitions. [2021-11-07 01:44:23,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 748 transitions. [2021-11-07 01:44:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:23,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:23,635 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:23,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:23,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:23,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:23,851 INFO L85 PathProgramCache]: Analyzing trace with hash -356884022, now seen corresponding path program 6 times [2021-11-07 01:44:23,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:23,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832464787] [2021-11-07 01:44:23,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:44:23,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:23,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:23,853 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:23,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:44:25,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:44:25,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:25,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:25,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:25,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:26,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:26,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832464787] [2021-11-07 01:44:26,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832464787] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:26,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:26,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:44:26,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375426919] [2021-11-07 01:44:26,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:26,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:26,687 INFO L87 Difference]: Start difference. First operand 232 states and 748 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:27,764 INFO L93 Difference]: Finished difference Result 342 states and 1048 transitions. [2021-11-07 01:44:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:27,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:27,771 INFO L225 Difference]: With dead ends: 342 [2021-11-07 01:44:27,771 INFO L226 Difference]: Without dead ends: 342 [2021-11-07 01:44:27,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:44:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-07 01:44:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 228. [2021-11-07 01:44:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.198237885462555) internal successors, (726), 227 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 726 transitions. [2021-11-07 01:44:27,785 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 726 transitions. Word has length 24 [2021-11-07 01:44:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:27,785 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 726 transitions. [2021-11-07 01:44:27,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 726 transitions. [2021-11-07 01:44:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:27,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:27,787 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:27,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:28,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:28,003 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1525089528, now seen corresponding path program 7 times [2021-11-07 01:44:28,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:28,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920693658] [2021-11-07 01:44:28,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:44:28,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:28,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:28,005 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:28,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:44:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:29,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:29,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:30,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:30,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920693658] [2021-11-07 01:44:30,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920693658] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:30,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:30,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:44:30,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216570830] [2021-11-07 01:44:30,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:30,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:30,212 INFO L87 Difference]: Start difference. First operand 228 states and 726 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:31,057 INFO L93 Difference]: Finished difference Result 332 states and 1017 transitions. [2021-11-07 01:44:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:31,061 INFO L225 Difference]: With dead ends: 332 [2021-11-07 01:44:31,062 INFO L226 Difference]: Without dead ends: 332 [2021-11-07 01:44:31,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:44:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-07 01:44:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 236. [2021-11-07 01:44:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.234042553191489) internal successors, (760), 235 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 760 transitions. [2021-11-07 01:44:31,076 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 760 transitions. Word has length 24 [2021-11-07 01:44:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:31,076 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 760 transitions. [2021-11-07 01:44:31,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 760 transitions. [2021-11-07 01:44:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:31,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:31,078 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:31,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:31,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:31,313 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:31,313 INFO L85 PathProgramCache]: Analyzing trace with hash 58084024, now seen corresponding path program 8 times [2021-11-07 01:44:31,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:31,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634017016] [2021-11-07 01:44:31,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:44:31,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:31,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:31,315 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:31,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:44:32,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:44:32,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:32,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:33,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:34,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:34,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634017016] [2021-11-07 01:44:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634017016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:34,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:34,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:44:34,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242822790] [2021-11-07 01:44:34,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:44:34,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:44:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:34,068 INFO L87 Difference]: Start difference. First operand 236 states and 760 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:35,527 INFO L93 Difference]: Finished difference Result 374 states and 1125 transitions. [2021-11-07 01:44:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:44:35,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:44:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:35,531 INFO L225 Difference]: With dead ends: 374 [2021-11-07 01:44:35,532 INFO L226 Difference]: Without dead ends: 370 [2021-11-07 01:44:35,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:44:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-07 01:44:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 244. [2021-11-07 01:44:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.213991769547325) internal successors, (781), 243 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 781 transitions. [2021-11-07 01:44:35,548 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 781 transitions. Word has length 24 [2021-11-07 01:44:35,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:35,548 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 781 transitions. [2021-11-07 01:44:35,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 781 transitions. [2021-11-07 01:44:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:35,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:35,550 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:35,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:44:35,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:35,772 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:35,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1661844286, now seen corresponding path program 9 times [2021-11-07 01:44:35,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:35,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557792797] [2021-11-07 01:44:35,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:44:35,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:35,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:35,775 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:35,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:44:37,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:44:37,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:37,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:37,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:38,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:38,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557792797] [2021-11-07 01:44:38,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557792797] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:38,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:38,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:44:38,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110795661] [2021-11-07 01:44:38,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:38,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:38,531 INFO L87 Difference]: Start difference. First operand 244 states and 781 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:39,419 INFO L93 Difference]: Finished difference Result 326 states and 998 transitions. [2021-11-07 01:44:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:39,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:39,424 INFO L225 Difference]: With dead ends: 326 [2021-11-07 01:44:39,425 INFO L226 Difference]: Without dead ends: 326 [2021-11-07 01:44:39,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:44:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-07 01:44:39,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 244. [2021-11-07 01:44:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.213991769547325) internal successors, (781), 243 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 781 transitions. [2021-11-07 01:44:39,438 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 781 transitions. Word has length 24 [2021-11-07 01:44:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:39,439 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 781 transitions. [2021-11-07 01:44:39,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 781 transitions. [2021-11-07 01:44:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:39,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:39,441 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:39,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:39,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:39,655 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1434985075, now seen corresponding path program 7 times [2021-11-07 01:44:39,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:39,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416154532] [2021-11-07 01:44:39,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:44:39,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:39,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:39,657 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:39,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:44:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:41,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:41,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:41,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:42,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:42,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416154532] [2021-11-07 01:44:42,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416154532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:42,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:42,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:44:42,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312919970] [2021-11-07 01:44:42,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:44:42,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:44:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:42,580 INFO L87 Difference]: Start difference. First operand 244 states and 781 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:43,959 INFO L93 Difference]: Finished difference Result 412 states and 1216 transitions. [2021-11-07 01:44:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:44:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:44:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:43,963 INFO L225 Difference]: With dead ends: 412 [2021-11-07 01:44:43,963 INFO L226 Difference]: Without dead ends: 406 [2021-11-07 01:44:43,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:44:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-07 01:44:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 260. [2021-11-07 01:44:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.200772200772201) internal successors, (829), 259 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 829 transitions. [2021-11-07 01:44:43,979 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 829 transitions. Word has length 24 [2021-11-07 01:44:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:43,979 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 829 transitions. [2021-11-07 01:44:43,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 829 transitions. [2021-11-07 01:44:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:43,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:43,981 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:44,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:44,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:44,216 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash -285080021, now seen corresponding path program 8 times [2021-11-07 01:44:44,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:44,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144221460] [2021-11-07 01:44:44,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:44:44,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:44,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:44,218 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:44,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:44:45,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:44:45,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:45,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:45,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:46,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:47,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:47,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144221460] [2021-11-07 01:44:47,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144221460] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:47,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:47,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:44:47,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602143484] [2021-11-07 01:44:47,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:47,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:47,558 INFO L87 Difference]: Start difference. First operand 260 states and 829 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:48,950 INFO L93 Difference]: Finished difference Result 410 states and 1219 transitions. [2021-11-07 01:44:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:48,957 INFO L225 Difference]: With dead ends: 410 [2021-11-07 01:44:48,958 INFO L226 Difference]: Without dead ends: 410 [2021-11-07 01:44:48,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:44:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-07 01:44:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 258. [2021-11-07 01:44:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.2062256809338523) internal successors, (824), 257 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 824 transitions. [2021-11-07 01:44:48,984 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 824 transitions. Word has length 24 [2021-11-07 01:44:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:48,985 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 824 transitions. [2021-11-07 01:44:48,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 824 transitions. [2021-11-07 01:44:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:48,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:48,989 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:49,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:49,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:49,210 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash -626055923, now seen corresponding path program 9 times [2021-11-07 01:44:49,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:49,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589799219] [2021-11-07 01:44:49,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:44:49,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:49,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:49,213 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:49,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:44:50,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:44:50,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:50,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:51,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:52,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:52,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589799219] [2021-11-07 01:44:52,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589799219] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:52,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:52,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:44:52,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017450611] [2021-11-07 01:44:52,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:52,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:52,222 INFO L87 Difference]: Start difference. First operand 258 states and 824 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:53,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:53,383 INFO L93 Difference]: Finished difference Result 430 states and 1275 transitions. [2021-11-07 01:44:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:53,389 INFO L225 Difference]: With dead ends: 430 [2021-11-07 01:44:53,389 INFO L226 Difference]: Without dead ends: 430 [2021-11-07 01:44:53,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:44:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-07 01:44:53,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 256. [2021-11-07 01:44:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.211764705882353) internal successors, (819), 255 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 819 transitions. [2021-11-07 01:44:53,403 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 819 transitions. Word has length 24 [2021-11-07 01:44:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:53,403 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 819 transitions. [2021-11-07 01:44:53,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 819 transitions. [2021-11-07 01:44:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:53,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:53,406 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:53,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:53,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:53,619 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:53,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:53,619 INFO L85 PathProgramCache]: Analyzing trace with hash -744492704, now seen corresponding path program 10 times [2021-11-07 01:44:53,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:53,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730086268] [2021-11-07 01:44:53,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:44:53,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:53,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:53,621 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:53,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:44:55,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:44:55,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:55,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:55,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:55,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:56,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:56,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730086268] [2021-11-07 01:44:56,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730086268] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:44:56,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:44:56,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:44:56,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963304240] [2021-11-07 01:44:56,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:56,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:56,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:56,343 INFO L87 Difference]: Start difference. First operand 256 states and 819 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:57,276 INFO L93 Difference]: Finished difference Result 396 states and 1221 transitions. [2021-11-07 01:44:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:57,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:44:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:57,281 INFO L225 Difference]: With dead ends: 396 [2021-11-07 01:44:57,281 INFO L226 Difference]: Without dead ends: 396 [2021-11-07 01:44:57,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:44:57,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-07 01:44:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 250. [2021-11-07 01:44:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.2248995983935744) internal successors, (803), 249 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 803 transitions. [2021-11-07 01:44:57,292 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 803 transitions. Word has length 24 [2021-11-07 01:44:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:57,293 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 803 transitions. [2021-11-07 01:44:57,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:44:57,293 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 803 transitions. [2021-11-07 01:44:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:57,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:57,295 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:57,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:57,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:57,511 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:44:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:57,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1766285942, now seen corresponding path program 11 times [2021-11-07 01:44:57,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:57,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930952839] [2021-11-07 01:44:57,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:44:57,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:57,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:57,513 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:57,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:44:59,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:44:59,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:59,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:59,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:59,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:00,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:00,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930952839] [2021-11-07 01:45:00,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930952839] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:45:00,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:45:00,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:45:00,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847091702] [2021-11-07 01:45:00,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:00,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:00,525 INFO L87 Difference]: Start difference. First operand 250 states and 803 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:01,726 INFO L93 Difference]: Finished difference Result 412 states and 1293 transitions. [2021-11-07 01:45:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:01,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:45:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:01,730 INFO L225 Difference]: With dead ends: 412 [2021-11-07 01:45:01,730 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:45:01,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:45:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 254. [2021-11-07 01:45:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.260869565217391) internal successors, (825), 253 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 825 transitions. [2021-11-07 01:45:01,744 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 825 transitions. Word has length 24 [2021-11-07 01:45:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:01,744 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 825 transitions. [2021-11-07 01:45:01,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 825 transitions. [2021-11-07 01:45:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:01,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:01,750 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:01,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:01,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:01,967 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:01,967 INFO L85 PathProgramCache]: Analyzing trace with hash -818068046, now seen corresponding path program 12 times [2021-11-07 01:45:01,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:01,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128141648] [2021-11-07 01:45:01,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:45:01,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:01,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:01,969 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:01,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:45:03,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:45:03,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:03,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:04,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:04,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:04,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128141648] [2021-11-07 01:45:04,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128141648] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:45:04,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:45:04,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:45:04,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049890893] [2021-11-07 01:45:04,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:04,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:04,841 INFO L87 Difference]: Start difference. First operand 254 states and 825 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:05,759 INFO L93 Difference]: Finished difference Result 392 states and 1245 transitions. [2021-11-07 01:45:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:05,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:45:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:05,763 INFO L225 Difference]: With dead ends: 392 [2021-11-07 01:45:05,764 INFO L226 Difference]: Without dead ends: 392 [2021-11-07 01:45:05,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-07 01:45:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 246. [2021-11-07 01:45:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.204081632653061) internal successors, (785), 245 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 785 transitions. [2021-11-07 01:45:05,771 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 785 transitions. Word has length 24 [2021-11-07 01:45:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:05,772 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 785 transitions. [2021-11-07 01:45:05,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 785 transitions. [2021-11-07 01:45:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:05,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:05,773 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:05,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:05,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:05,974 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:05,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1513675696, now seen corresponding path program 13 times [2021-11-07 01:45:05,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:05,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661736422] [2021-11-07 01:45:05,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:45:05,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:05,976 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:05,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:45:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:07,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:08,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:08,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661736422] [2021-11-07 01:45:08,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661736422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:08,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:08,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:45:08,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209542528] [2021-11-07 01:45:08,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:45:08,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:08,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:45:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:08,719 INFO L87 Difference]: Start difference. First operand 246 states and 785 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:10,093 INFO L93 Difference]: Finished difference Result 442 states and 1331 transitions. [2021-11-07 01:45:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:45:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:45:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:10,097 INFO L225 Difference]: With dead ends: 442 [2021-11-07 01:45:10,098 INFO L226 Difference]: Without dead ends: 438 [2021-11-07 01:45:10,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:45:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-07 01:45:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 258. [2021-11-07 01:45:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.237354085603113) internal successors, (832), 257 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 832 transitions. [2021-11-07 01:45:10,112 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 832 transitions. Word has length 24 [2021-11-07 01:45:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:10,112 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 832 transitions. [2021-11-07 01:45:10,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 832 transitions. [2021-11-07 01:45:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:10,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:10,114 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:10,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:10,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:10,335 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1177531338, now seen corresponding path program 14 times [2021-11-07 01:45:10,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:10,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88056517] [2021-11-07 01:45:10,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:45:10,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:10,337 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:10,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:45:11,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:45:11,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:11,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:11,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:12,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:13,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:13,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88056517] [2021-11-07 01:45:13,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88056517] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:45:13,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:45:13,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:45:13,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525568162] [2021-11-07 01:45:13,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:13,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:13,203 INFO L87 Difference]: Start difference. First operand 258 states and 832 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:14,376 INFO L93 Difference]: Finished difference Result 392 states and 1204 transitions. [2021-11-07 01:45:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:45:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:14,380 INFO L225 Difference]: With dead ends: 392 [2021-11-07 01:45:14,380 INFO L226 Difference]: Without dead ends: 392 [2021-11-07 01:45:14,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-07 01:45:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 256. [2021-11-07 01:45:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.243137254901961) internal successors, (827), 255 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 827 transitions. [2021-11-07 01:45:14,391 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 827 transitions. Word has length 24 [2021-11-07 01:45:14,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:14,392 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 827 transitions. [2021-11-07 01:45:14,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 827 transitions. [2021-11-07 01:45:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:14,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:14,394 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:14,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-07 01:45:14,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:14,629 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1621044451, now seen corresponding path program 10 times [2021-11-07 01:45:14,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:14,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317946263] [2021-11-07 01:45:14,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:45:14,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:14,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:14,631 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:14,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:45:16,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:45:16,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:16,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:16,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:16,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:17,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:17,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317946263] [2021-11-07 01:45:17,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317946263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:17,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:17,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:45:17,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34181326] [2021-11-07 01:45:17,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:45:17,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:17,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:45:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:17,794 INFO L87 Difference]: Start difference. First operand 256 states and 827 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:19,100 INFO L93 Difference]: Finished difference Result 448 states and 1323 transitions. [2021-11-07 01:45:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:45:19,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:45:19,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:19,104 INFO L225 Difference]: With dead ends: 448 [2021-11-07 01:45:19,104 INFO L226 Difference]: Without dead ends: 442 [2021-11-07 01:45:19,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:45:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-07 01:45:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 262. [2021-11-07 01:45:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.2720306513409962) internal successors, (854), 261 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 854 transitions. [2021-11-07 01:45:19,116 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 854 transitions. Word has length 24 [2021-11-07 01:45:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:19,117 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 854 transitions. [2021-11-07 01:45:19,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:19,117 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 854 transitions. [2021-11-07 01:45:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:19,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:19,119 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:19,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:19,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:19,338 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1524017791, now seen corresponding path program 11 times [2021-11-07 01:45:19,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:19,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101288943] [2021-11-07 01:45:19,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:45:19,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:19,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:19,340 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:19,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:45:20,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:45:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:20,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:21,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:22,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:22,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101288943] [2021-11-07 01:45:22,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101288943] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:45:22,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:45:22,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:45:22,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705532621] [2021-11-07 01:45:22,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:22,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:22,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:22,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:22,507 INFO L87 Difference]: Start difference. First operand 262 states and 854 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:23,723 INFO L93 Difference]: Finished difference Result 452 states and 1343 transitions. [2021-11-07 01:45:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:23,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:45:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:23,728 INFO L225 Difference]: With dead ends: 452 [2021-11-07 01:45:23,728 INFO L226 Difference]: Without dead ends: 452 [2021-11-07 01:45:23,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-07 01:45:23,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 258. [2021-11-07 01:45:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.2684824902723735) internal successors, (840), 257 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:23,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 840 transitions. [2021-11-07 01:45:23,737 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 840 transitions. Word has length 24 [2021-11-07 01:45:23,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:23,738 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 840 transitions. [2021-11-07 01:45:23,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 840 transitions. [2021-11-07 01:45:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:23,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:23,740 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:23,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:23,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:23,941 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash 440590316, now seen corresponding path program 15 times [2021-11-07 01:45:23,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:23,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989514456] [2021-11-07 01:45:23,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:45:23,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:23,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:23,942 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:23,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:45:25,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:45:25,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:25,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:25,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:26,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:26,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:26,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989514456] [2021-11-07 01:45:26,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989514456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:26,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:26,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:45:26,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37338117] [2021-11-07 01:45:26,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:45:26,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:45:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:26,885 INFO L87 Difference]: Start difference. First operand 258 states and 840 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:28,235 INFO L93 Difference]: Finished difference Result 432 states and 1309 transitions. [2021-11-07 01:45:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:45:28,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:45:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:28,238 INFO L225 Difference]: With dead ends: 432 [2021-11-07 01:45:28,238 INFO L226 Difference]: Without dead ends: 428 [2021-11-07 01:45:28,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:45:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-07 01:45:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 266. [2021-11-07 01:45:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.29811320754717) internal successors, (874), 265 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 874 transitions. [2021-11-07 01:45:28,250 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 874 transitions. Word has length 24 [2021-11-07 01:45:28,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:28,250 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 874 transitions. [2021-11-07 01:45:28,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 874 transitions. [2021-11-07 01:45:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:28,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:28,252 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:28,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:28,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:28,463 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1062981887, now seen corresponding path program 12 times [2021-11-07 01:45:28,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:28,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127980920] [2021-11-07 01:45:28,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:45:28,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:28,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:28,466 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:28,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 01:45:30,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:45:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:31,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:31,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:31,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127980920] [2021-11-07 01:45:31,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127980920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:31,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:31,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:45:31,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332570127] [2021-11-07 01:45:31,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:45:31,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:31,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:45:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:31,898 INFO L87 Difference]: Start difference. First operand 266 states and 874 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:33,034 INFO L93 Difference]: Finished difference Result 422 states and 1275 transitions. [2021-11-07 01:45:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:45:33,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:45:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:33,038 INFO L225 Difference]: With dead ends: 422 [2021-11-07 01:45:33,038 INFO L226 Difference]: Without dead ends: 416 [2021-11-07 01:45:33,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:45:33,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-07 01:45:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 270. [2021-11-07 01:45:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.3048327137546467) internal successors, (889), 269 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 889 transitions. [2021-11-07 01:45:33,046 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 889 transitions. Word has length 24 [2021-11-07 01:45:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:33,046 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 889 transitions. [2021-11-07 01:45:33,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 889 transitions. [2021-11-07 01:45:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:33,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:33,048 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:33,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-07 01:45:33,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:33,283 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash 94094932, now seen corresponding path program 16 times [2021-11-07 01:45:33,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:33,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364445209] [2021-11-07 01:45:33,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:45:33,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:33,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:33,285 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:33,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 01:45:34,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:45:34,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:34,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:35,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:36,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:36,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364445209] [2021-11-07 01:45:36,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364445209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:36,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:36,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:45:36,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315559399] [2021-11-07 01:45:36,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:45:36,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:45:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:36,244 INFO L87 Difference]: Start difference. First operand 270 states and 889 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:37,670 INFO L93 Difference]: Finished difference Result 444 states and 1370 transitions. [2021-11-07 01:45:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:45:37,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:45:37,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:37,674 INFO L225 Difference]: With dead ends: 444 [2021-11-07 01:45:37,674 INFO L226 Difference]: Without dead ends: 444 [2021-11-07 01:45:37,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:45:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-07 01:45:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 270. [2021-11-07 01:45:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.3048327137546467) internal successors, (889), 269 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 889 transitions. [2021-11-07 01:45:37,694 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 889 transitions. Word has length 24 [2021-11-07 01:45:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:37,695 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 889 transitions. [2021-11-07 01:45:37,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 889 transitions. [2021-11-07 01:45:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:37,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:37,697 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:37,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:37,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:37,917 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash -914745583, now seen corresponding path program 13 times [2021-11-07 01:45:37,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:37,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707747065] [2021-11-07 01:45:37,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:45:37,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:37,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:37,919 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:37,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 01:45:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:39,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:40,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:41,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:41,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707747065] [2021-11-07 01:45:41,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707747065] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:45:41,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:45:41,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:45:41,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694295576] [2021-11-07 01:45:41,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:41,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:41,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:41,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:41,401 INFO L87 Difference]: Start difference. First operand 270 states and 889 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:42,327 INFO L93 Difference]: Finished difference Result 410 states and 1270 transitions. [2021-11-07 01:45:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:42,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:45:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:42,331 INFO L225 Difference]: With dead ends: 410 [2021-11-07 01:45:42,331 INFO L226 Difference]: Without dead ends: 410 [2021-11-07 01:45:42,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:45:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-07 01:45:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 274. [2021-11-07 01:45:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.311355311355311) internal successors, (904), 273 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 904 transitions. [2021-11-07 01:45:42,342 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 904 transitions. Word has length 24 [2021-11-07 01:45:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:42,343 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 904 transitions. [2021-11-07 01:45:42,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 904 transitions. [2021-11-07 01:45:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:42,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:42,344 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:42,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:42,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:42,553 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash 966013646, now seen corresponding path program 17 times [2021-11-07 01:45:42,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:42,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110689951] [2021-11-07 01:45:42,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:45:42,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:42,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:42,555 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:42,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 01:45:44,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:45:44,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:44,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:44,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:45,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:45,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110689951] [2021-11-07 01:45:45,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110689951] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:45:45,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:45:45,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:45:45,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769932918] [2021-11-07 01:45:45,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:45,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:45,748 INFO L87 Difference]: Start difference. First operand 274 states and 904 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:46,909 INFO L93 Difference]: Finished difference Result 388 states and 1229 transitions. [2021-11-07 01:45:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:46,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:45:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:46,913 INFO L225 Difference]: With dead ends: 388 [2021-11-07 01:45:46,914 INFO L226 Difference]: Without dead ends: 388 [2021-11-07 01:45:46,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-07 01:45:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 274. [2021-11-07 01:45:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.311355311355311) internal successors, (904), 273 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 904 transitions. [2021-11-07 01:45:46,921 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 904 transitions. Word has length 24 [2021-11-07 01:45:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:46,921 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 904 transitions. [2021-11-07 01:45:46,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 904 transitions. [2021-11-07 01:45:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:46,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:46,923 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:46,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:47,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:47,139 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash -873637844, now seen corresponding path program 18 times [2021-11-07 01:45:47,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:47,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697597605] [2021-11-07 01:45:47,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:45:47,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:47,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:47,140 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:47,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 01:45:49,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:45:49,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:49,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:49,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:50,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:50,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697597605] [2021-11-07 01:45:50,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697597605] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:45:50,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:45:50,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:45:50,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495744914] [2021-11-07 01:45:50,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:50,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:50,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:50,795 INFO L87 Difference]: Start difference. First operand 274 states and 904 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:51,882 INFO L93 Difference]: Finished difference Result 378 states and 1211 transitions. [2021-11-07 01:45:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:45:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:51,886 INFO L225 Difference]: With dead ends: 378 [2021-11-07 01:45:51,886 INFO L226 Difference]: Without dead ends: 378 [2021-11-07 01:45:51,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:51,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-07 01:45:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 262. [2021-11-07 01:45:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.2796934865900385) internal successors, (856), 261 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 856 transitions. [2021-11-07 01:45:51,894 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 856 transitions. Word has length 24 [2021-11-07 01:45:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:51,894 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 856 transitions. [2021-11-07 01:45:51,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 856 transitions. [2021-11-07 01:45:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:51,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:51,896 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:51,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:52,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:52,111 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:52,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1195634909, now seen corresponding path program 14 times [2021-11-07 01:45:52,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:52,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175740081] [2021-11-07 01:45:52,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:45:52,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:52,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:52,113 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:52,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 01:45:54,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:45:54,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:54,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:54,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:54,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:56,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:56,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175740081] [2021-11-07 01:45:56,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175740081] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:45:56,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:45:56,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:45:56,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567836800] [2021-11-07 01:45:56,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:56,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:56,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:56,180 INFO L87 Difference]: Start difference. First operand 262 states and 856 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:57,498 INFO L93 Difference]: Finished difference Result 436 states and 1322 transitions. [2021-11-07 01:45:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:45:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:57,503 INFO L225 Difference]: With dead ends: 436 [2021-11-07 01:45:57,503 INFO L226 Difference]: Without dead ends: 436 [2021-11-07 01:45:57,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-07 01:45:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 266. [2021-11-07 01:45:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.3132075471698115) internal successors, (878), 265 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 878 transitions. [2021-11-07 01:45:57,513 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 878 transitions. Word has length 24 [2021-11-07 01:45:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:57,513 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 878 transitions. [2021-11-07 01:45:57,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:45:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 878 transitions. [2021-11-07 01:45:57,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:45:57,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:57,515 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:57,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:57,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:57,716 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:45:57,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:57,716 INFO L85 PathProgramCache]: Analyzing trace with hash -340328255, now seen corresponding path program 15 times [2021-11-07 01:45:57,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:57,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966688729] [2021-11-07 01:45:57,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:45:57,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:57,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:57,717 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:57,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-07 01:45:59,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:45:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:59,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:59,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:00,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:01,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:01,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966688729] [2021-11-07 01:46:01,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966688729] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:46:01,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:46:01,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:46:01,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860077302] [2021-11-07 01:46:01,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:01,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:01,862 INFO L87 Difference]: Start difference. First operand 266 states and 878 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:02,846 INFO L93 Difference]: Finished difference Result 422 states and 1298 transitions. [2021-11-07 01:46:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:02,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:46:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:02,850 INFO L225 Difference]: With dead ends: 422 [2021-11-07 01:46:02,850 INFO L226 Difference]: Without dead ends: 422 [2021-11-07 01:46:02,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:46:02,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-07 01:46:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 266. [2021-11-07 01:46:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.3132075471698115) internal successors, (878), 265 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 878 transitions. [2021-11-07 01:46:02,857 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 878 transitions. Word has length 24 [2021-11-07 01:46:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:02,858 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 878 transitions. [2021-11-07 01:46:02,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 878 transitions. [2021-11-07 01:46:02,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:02,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:02,859 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:02,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:03,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:03,059 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash 963878827, now seen corresponding path program 16 times [2021-11-07 01:46:03,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:03,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218973097] [2021-11-07 01:46:03,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:46:03,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:03,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:03,062 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:03,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 01:46:04,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:46:04,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:05,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:06,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:06,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218973097] [2021-11-07 01:46:06,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218973097] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:46:06,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:46:06,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:46:06,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733798185] [2021-11-07 01:46:06,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:06,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:06,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:06,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:46:06,057 INFO L87 Difference]: Start difference. First operand 266 states and 878 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:07,044 INFO L93 Difference]: Finished difference Result 414 states and 1275 transitions. [2021-11-07 01:46:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:07,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:46:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:07,048 INFO L225 Difference]: With dead ends: 414 [2021-11-07 01:46:07,048 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 01:46:07,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:46:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 01:46:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 266. [2021-11-07 01:46:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.3132075471698115) internal successors, (878), 265 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 878 transitions. [2021-11-07 01:46:07,055 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 878 transitions. Word has length 24 [2021-11-07 01:46:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:07,056 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 878 transitions. [2021-11-07 01:46:07,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 878 transitions. [2021-11-07 01:46:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:07,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:07,057 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:07,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-07 01:46:07,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:07,271 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:07,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1119014017, now seen corresponding path program 17 times [2021-11-07 01:46:07,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:07,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262985058] [2021-11-07 01:46:07,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:46:07,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:07,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:07,273 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:07,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-07 01:46:09,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:46:09,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:09,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:10,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:10,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262985058] [2021-11-07 01:46:10,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262985058] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:46:10,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:46:10,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:46:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010332767] [2021-11-07 01:46:10,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:10,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:10,840 INFO L87 Difference]: Start difference. First operand 266 states and 878 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:11,957 INFO L93 Difference]: Finished difference Result 412 states and 1279 transitions. [2021-11-07 01:46:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:11,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:46:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:11,962 INFO L225 Difference]: With dead ends: 412 [2021-11-07 01:46:11,962 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:46:11,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:46:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:46:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 266. [2021-11-07 01:46:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.3132075471698115) internal successors, (878), 265 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 878 transitions. [2021-11-07 01:46:11,971 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 878 transitions. Word has length 24 [2021-11-07 01:46:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:11,971 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 878 transitions. [2021-11-07 01:46:11,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 878 transitions. [2021-11-07 01:46:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:11,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:11,973 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:11,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:12,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:12,187 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:12,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:12,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1974320671, now seen corresponding path program 18 times [2021-11-07 01:46:12,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:12,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963884990] [2021-11-07 01:46:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:46:12,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:12,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:12,189 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:12,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-07 01:46:14,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:46:14,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:14,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:15,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:16,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:16,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963884990] [2021-11-07 01:46:16,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963884990] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:46:16,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:46:16,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:46:16,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424881716] [2021-11-07 01:46:16,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:16,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:16,272 INFO L87 Difference]: Start difference. First operand 266 states and 878 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:17,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:17,418 INFO L93 Difference]: Finished difference Result 390 states and 1233 transitions. [2021-11-07 01:46:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:17,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:46:17,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:17,422 INFO L225 Difference]: With dead ends: 390 [2021-11-07 01:46:17,423 INFO L226 Difference]: Without dead ends: 390 [2021-11-07 01:46:17,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:46:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-07 01:46:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 252. [2021-11-07 01:46:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.2908366533864544) internal successors, (826), 251 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 826 transitions. [2021-11-07 01:46:17,431 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 826 transitions. Word has length 24 [2021-11-07 01:46:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:17,431 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 826 transitions. [2021-11-07 01:46:17,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 826 transitions. [2021-11-07 01:46:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:17,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:17,432 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:17,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:17,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:17,632 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:17,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash -262229735, now seen corresponding path program 19 times [2021-11-07 01:46:17,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:17,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015401893] [2021-11-07 01:46:17,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:46:17,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:17,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:17,635 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:17,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-07 01:46:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:19,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:20,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:21,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:21,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015401893] [2021-11-07 01:46:21,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015401893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:21,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:21,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 01:46:21,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231411034] [2021-11-07 01:46:21,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:46:21,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:46:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:46:21,110 INFO L87 Difference]: Start difference. First operand 252 states and 826 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:21,761 INFO L93 Difference]: Finished difference Result 446 states and 1320 transitions. [2021-11-07 01:46:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:21,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:46:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:21,765 INFO L225 Difference]: With dead ends: 446 [2021-11-07 01:46:21,766 INFO L226 Difference]: Without dead ends: 432 [2021-11-07 01:46:21,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:46:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-07 01:46:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 260. [2021-11-07 01:46:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.305019305019305) internal successors, (856), 259 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 856 transitions. [2021-11-07 01:46:21,775 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 856 transitions. Word has length 24 [2021-11-07 01:46:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:21,775 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 856 transitions. [2021-11-07 01:46:21,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 856 transitions. [2021-11-07 01:46:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:21,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:21,776 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:21,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:21,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:21,977 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash 781972109, now seen corresponding path program 20 times [2021-11-07 01:46:21,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:21,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926558626] [2021-11-07 01:46:21,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:46:21,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:21,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:21,978 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:21,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-07 01:46:24,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:24,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:24,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:25,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:25,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926558626] [2021-11-07 01:46:25,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926558626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:25,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:25,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:46:25,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098448721] [2021-11-07 01:46:25,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:46:25,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:46:25,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:25,927 INFO L87 Difference]: Start difference. First operand 260 states and 856 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:27,158 INFO L93 Difference]: Finished difference Result 458 states and 1342 transitions. [2021-11-07 01:46:27,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:46:27,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:46:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:27,163 INFO L225 Difference]: With dead ends: 458 [2021-11-07 01:46:27,163 INFO L226 Difference]: Without dead ends: 452 [2021-11-07 01:46:27,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:46:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-07 01:46:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 270. [2021-11-07 01:46:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.275092936802974) internal successors, (881), 269 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:27,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 881 transitions. [2021-11-07 01:46:27,173 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 881 transitions. Word has length 24 [2021-11-07 01:46:27,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:27,174 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 881 transitions. [2021-11-07 01:46:27,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:27,174 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 881 transitions. [2021-11-07 01:46:27,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:27,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:27,174 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:27,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:27,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:27,375 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:27,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1931877163, now seen corresponding path program 21 times [2021-11-07 01:46:27,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:27,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990074109] [2021-11-07 01:46:27,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:46:27,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:27,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:27,377 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:27,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-07 01:46:29,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:46:29,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:29,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:29,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:30,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:31,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:31,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990074109] [2021-11-07 01:46:31,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990074109] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:46:31,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:46:31,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:46:31,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741158539] [2021-11-07 01:46:31,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:31,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:31,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:31,474 INFO L87 Difference]: Start difference. First operand 270 states and 881 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:32,597 INFO L93 Difference]: Finished difference Result 438 states and 1313 transitions. [2021-11-07 01:46:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:32,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:46:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:32,602 INFO L225 Difference]: With dead ends: 438 [2021-11-07 01:46:32,602 INFO L226 Difference]: Without dead ends: 438 [2021-11-07 01:46:32,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:46:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-07 01:46:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 256. [2021-11-07 01:46:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.3215686274509806) internal successors, (847), 255 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 847 transitions. [2021-11-07 01:46:32,613 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 847 transitions. Word has length 24 [2021-11-07 01:46:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:32,614 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 847 transitions. [2021-11-07 01:46:32,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 847 transitions. [2021-11-07 01:46:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:32,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:32,615 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:32,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:32,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:32,819 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1862667589, now seen corresponding path program 22 times [2021-11-07 01:46:32,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:32,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011181412] [2021-11-07 01:46:32,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:46:32,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:32,821 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:32,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-07 01:46:35,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:46:35,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:35,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:36,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:36,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011181412] [2021-11-07 01:46:36,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011181412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:36,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:36,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 01:46:36,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115009534] [2021-11-07 01:46:36,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:46:36,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:36,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:46:36,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:46:36,446 INFO L87 Difference]: Start difference. First operand 256 states and 847 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:37,237 INFO L93 Difference]: Finished difference Result 402 states and 1223 transitions. [2021-11-07 01:46:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:46:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:37,240 INFO L225 Difference]: With dead ends: 402 [2021-11-07 01:46:37,240 INFO L226 Difference]: Without dead ends: 388 [2021-11-07 01:46:37,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:46:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-07 01:46:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 262. [2021-11-07 01:46:37,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.3026819923371646) internal successors, (862), 261 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 862 transitions. [2021-11-07 01:46:37,249 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 862 transitions. Word has length 24 [2021-11-07 01:46:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:37,250 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 862 transitions. [2021-11-07 01:46:37,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 862 transitions. [2021-11-07 01:46:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:37,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:37,251 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:37,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:37,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:37,452 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1758634504, now seen corresponding path program 19 times [2021-11-07 01:46:37,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:37,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951493864] [2021-11-07 01:46:37,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:46:37,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:37,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:37,463 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:37,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-07 01:46:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:39,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:39,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:40,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:40,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:40,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951493864] [2021-11-07 01:46:40,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951493864] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:46:40,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:46:40,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:46:40,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671327433] [2021-11-07 01:46:40,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:40,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:40,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:46:40,837 INFO L87 Difference]: Start difference. First operand 262 states and 862 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:41,428 INFO L93 Difference]: Finished difference Result 422 states and 1297 transitions. [2021-11-07 01:46:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:41,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:46:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:41,431 INFO L225 Difference]: With dead ends: 422 [2021-11-07 01:46:41,431 INFO L226 Difference]: Without dead ends: 422 [2021-11-07 01:46:41,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:46:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-07 01:46:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 272. [2021-11-07 01:46:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.3357933579335795) internal successors, (904), 271 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 904 transitions. [2021-11-07 01:46:41,439 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 904 transitions. Word has length 24 [2021-11-07 01:46:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:41,440 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 904 transitions. [2021-11-07 01:46:41,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:46:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 904 transitions. [2021-11-07 01:46:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:41,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:41,441 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:41,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:41,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:41,647 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:41,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:41,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1998919880, now seen corresponding path program 20 times [2021-11-07 01:46:41,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:41,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091707197] [2021-11-07 01:46:41,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:46:41,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:41,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:41,649 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:41,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-07 01:46:44,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:44,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:44,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:44,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:44,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:45,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:45,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091707197] [2021-11-07 01:46:45,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091707197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:45,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:45,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:46:45,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390801485] [2021-11-07 01:46:45,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:46:45,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:45,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:46:45,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:45,155 INFO L87 Difference]: Start difference. First operand 272 states and 904 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:46,295 INFO L93 Difference]: Finished difference Result 466 states and 1431 transitions. [2021-11-07 01:46:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:46:46,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:46:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:46,297 INFO L225 Difference]: With dead ends: 466 [2021-11-07 01:46:46,297 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:46:46,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:46:46,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:46:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 284. [2021-11-07 01:46:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3392226148409896) internal successors, (945), 283 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 945 transitions. [2021-11-07 01:46:46,305 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 945 transitions. Word has length 24 [2021-11-07 01:46:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:46,305 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 945 transitions. [2021-11-07 01:46:46,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 945 transitions. [2021-11-07 01:46:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:46,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:46,306 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:46,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:46,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:46,507 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:46,507 INFO L85 PathProgramCache]: Analyzing trace with hash 792475213, now seen corresponding path program 23 times [2021-11-07 01:46:46,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:46,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20755078] [2021-11-07 01:46:46,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:46:46,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:46,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:46,509 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:46,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-07 01:46:48,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:46:48,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:48,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:49,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:50,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:50,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20755078] [2021-11-07 01:46:50,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20755078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:50,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:50,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:46:50,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296221950] [2021-11-07 01:46:50,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:46:50,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:50,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:46:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:50,411 INFO L87 Difference]: Start difference. First operand 284 states and 945 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:51,514 INFO L93 Difference]: Finished difference Result 418 states and 1300 transitions. [2021-11-07 01:46:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:46:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:46:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:51,517 INFO L225 Difference]: With dead ends: 418 [2021-11-07 01:46:51,517 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:46:51,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:46:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:46:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 294. [2021-11-07 01:46:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.3139931740614332) internal successors, (971), 293 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 971 transitions. [2021-11-07 01:46:51,536 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 971 transitions. Word has length 24 [2021-11-07 01:46:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:51,537 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 971 transitions. [2021-11-07 01:46:51,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 971 transitions. [2021-11-07 01:46:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:51,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:51,538 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:51,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:51,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:51,765 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1949552032, now seen corresponding path program 21 times [2021-11-07 01:46:51,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:51,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522206690] [2021-11-07 01:46:51,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:46:51,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:51,766 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:51,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-07 01:46:54,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:46:54,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:54,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:54,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:54,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:46:55,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:55,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522206690] [2021-11-07 01:46:55,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522206690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:55,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:55,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:46:55,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500158429] [2021-11-07 01:46:55,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:46:55,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:46:55,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:55,409 INFO L87 Difference]: Start difference. First operand 294 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:56,456 INFO L93 Difference]: Finished difference Result 496 states and 1517 transitions. [2021-11-07 01:46:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:46:56,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:46:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:56,460 INFO L225 Difference]: With dead ends: 496 [2021-11-07 01:46:56,460 INFO L226 Difference]: Without dead ends: 496 [2021-11-07 01:46:56,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:46:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-07 01:46:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 294. [2021-11-07 01:46:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.3139931740614332) internal successors, (971), 293 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 971 transitions. [2021-11-07 01:46:56,468 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 971 transitions. Word has length 24 [2021-11-07 01:46:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:56,469 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 971 transitions. [2021-11-07 01:46:56,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 971 transitions. [2021-11-07 01:46:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:46:56,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:56,470 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:56,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:56,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:56,670 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:46:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:56,671 INFO L85 PathProgramCache]: Analyzing trace with hash 940711517, now seen corresponding path program 24 times [2021-11-07 01:46:56,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:56,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99643056] [2021-11-07 01:46:56,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:46:56,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:56,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:56,672 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:56,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-07 01:46:59,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:46:59,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:00,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:01,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:01,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99643056] [2021-11-07 01:47:01,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99643056] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:47:01,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:47:01,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:47:01,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327372210] [2021-11-07 01:47:01,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:01,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:01,218 INFO L87 Difference]: Start difference. First operand 294 states and 971 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:02,034 INFO L93 Difference]: Finished difference Result 398 states and 1265 transitions. [2021-11-07 01:47:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:02,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:47:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:02,036 INFO L225 Difference]: With dead ends: 398 [2021-11-07 01:47:02,036 INFO L226 Difference]: Without dead ends: 398 [2021-11-07 01:47:02,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:47:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-07 01:47:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 280. [2021-11-07 01:47:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.3333333333333335) internal successors, (930), 279 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 930 transitions. [2021-11-07 01:47:02,045 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 930 transitions. Word has length 24 [2021-11-07 01:47:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:02,045 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 930 transitions. [2021-11-07 01:47:02,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 930 transitions. [2021-11-07 01:47:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:02,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:02,046 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:02,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:02,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:02,247 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:02,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1856685310, now seen corresponding path program 22 times [2021-11-07 01:47:02,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:02,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917171488] [2021-11-07 01:47:02,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:47:02,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:02,248 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:02,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-07 01:47:04,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:47:04,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:04,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:04,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:05,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:06,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:06,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917171488] [2021-11-07 01:47:06,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917171488] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:47:06,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:47:06,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:47:06,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736279814] [2021-11-07 01:47:06,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:06,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:06,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:47:06,007 INFO L87 Difference]: Start difference. First operand 280 states and 930 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:06,798 INFO L93 Difference]: Finished difference Result 478 states and 1479 transitions. [2021-11-07 01:47:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:06,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:47:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:06,802 INFO L225 Difference]: With dead ends: 478 [2021-11-07 01:47:06,802 INFO L226 Difference]: Without dead ends: 478 [2021-11-07 01:47:06,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:47:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-07 01:47:06,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 270. [2021-11-07 01:47:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.3308550185873607) internal successors, (896), 269 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 896 transitions. [2021-11-07 01:47:06,810 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 896 transitions. Word has length 24 [2021-11-07 01:47:06,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:06,810 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 896 transitions. [2021-11-07 01:47:06,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:06,810 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 896 transitions. [2021-11-07 01:47:06,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:06,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:06,811 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:06,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:07,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:07,012 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:07,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1842323918, now seen corresponding path program 23 times [2021-11-07 01:47:07,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:07,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083921553] [2021-11-07 01:47:07,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:47:07,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:07,014 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:07,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-07 01:47:09,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:47:09,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:09,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:09,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:10,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:11,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:11,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083921553] [2021-11-07 01:47:11,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083921553] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:47:11,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:47:11,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:47:11,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644812496] [2021-11-07 01:47:11,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:11,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:11,046 INFO L87 Difference]: Start difference. First operand 270 states and 896 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:12,002 INFO L93 Difference]: Finished difference Result 446 states and 1423 transitions. [2021-11-07 01:47:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:47:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:12,005 INFO L225 Difference]: With dead ends: 446 [2021-11-07 01:47:12,005 INFO L226 Difference]: Without dead ends: 446 [2021-11-07 01:47:12,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:47:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-07 01:47:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 274. [2021-11-07 01:47:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.3626373626373627) internal successors, (918), 273 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 918 transitions. [2021-11-07 01:47:12,012 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 918 transitions. Word has length 24 [2021-11-07 01:47:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:12,012 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 918 transitions. [2021-11-07 01:47:12,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 918 transitions. [2021-11-07 01:47:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:12,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:12,013 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:12,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:12,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:12,214 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash -742030070, now seen corresponding path program 24 times [2021-11-07 01:47:12,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:12,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221656300] [2021-11-07 01:47:12,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:47:12,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:12,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:12,216 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:12,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-07 01:47:15,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:47:15,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:15,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:15,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:15,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:16,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:16,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221656300] [2021-11-07 01:47:16,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221656300] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:47:16,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:47:16,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:47:16,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669715186] [2021-11-07 01:47:16,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:16,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:16,708 INFO L87 Difference]: Start difference. First operand 274 states and 918 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:17,854 INFO L93 Difference]: Finished difference Result 440 states and 1411 transitions. [2021-11-07 01:47:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:17,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:47:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:17,857 INFO L225 Difference]: With dead ends: 440 [2021-11-07 01:47:17,858 INFO L226 Difference]: Without dead ends: 440 [2021-11-07 01:47:17,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:47:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-07 01:47:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 262. [2021-11-07 01:47:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.3026819923371646) internal successors, (862), 261 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 862 transitions. [2021-11-07 01:47:17,865 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 862 transitions. Word has length 24 [2021-11-07 01:47:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:17,865 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 862 transitions. [2021-11-07 01:47:17,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 862 transitions. [2021-11-07 01:47:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:17,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:17,866 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:17,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:18,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:18,067 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1379651592, now seen corresponding path program 25 times [2021-11-07 01:47:18,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:18,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763980775] [2021-11-07 01:47:18,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:47:18,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:18,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:18,069 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:18,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-07 01:47:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:20,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:21,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:22,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:22,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763980775] [2021-11-07 01:47:22,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763980775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:22,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:22,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:47:22,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053854840] [2021-11-07 01:47:22,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:47:22,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:22,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:47:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:22,103 INFO L87 Difference]: Start difference. First operand 262 states and 862 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:23,230 INFO L93 Difference]: Finished difference Result 488 states and 1499 transitions. [2021-11-07 01:47:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:47:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:47:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:23,233 INFO L225 Difference]: With dead ends: 488 [2021-11-07 01:47:23,233 INFO L226 Difference]: Without dead ends: 484 [2021-11-07 01:47:23,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:47:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-07 01:47:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 274. [2021-11-07 01:47:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.32967032967033) internal successors, (909), 273 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 909 transitions. [2021-11-07 01:47:23,240 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 909 transitions. Word has length 24 [2021-11-07 01:47:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:23,240 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 909 transitions. [2021-11-07 01:47:23,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 909 transitions. [2021-11-07 01:47:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:23,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:23,241 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:23,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:23,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:23,441 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:23,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1311555442, now seen corresponding path program 26 times [2021-11-07 01:47:23,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:23,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278937933] [2021-11-07 01:47:23,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:47:23,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:23,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:23,443 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:23,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-07 01:47:26,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:47:26,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:26,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:26,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:27,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:27,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278937933] [2021-11-07 01:47:27,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278937933] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:47:27,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:47:27,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:47:27,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305907954] [2021-11-07 01:47:27,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:27,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:27,658 INFO L87 Difference]: Start difference. First operand 274 states and 909 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:28,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:28,471 INFO L93 Difference]: Finished difference Result 412 states and 1289 transitions. [2021-11-07 01:47:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:28,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:47:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:28,474 INFO L225 Difference]: With dead ends: 412 [2021-11-07 01:47:28,474 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:47:28,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:47:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:47:28,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 272. [2021-11-07 01:47:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.3357933579335795) internal successors, (904), 271 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 904 transitions. [2021-11-07 01:47:28,482 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 904 transitions. Word has length 24 [2021-11-07 01:47:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:28,482 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 904 transitions. [2021-11-07 01:47:28,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 904 transitions. [2021-11-07 01:47:28,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:28,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:28,483 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:28,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:28,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:28,683 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1487020347, now seen corresponding path program 25 times [2021-11-07 01:47:28,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:28,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950149048] [2021-11-07 01:47:28,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:47:28,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:28,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:28,685 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:28,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-07 01:47:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:31,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:31,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:32,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:33,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:33,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950149048] [2021-11-07 01:47:33,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950149048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:33,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:33,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:47:33,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404753487] [2021-11-07 01:47:33,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:47:33,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:47:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:33,338 INFO L87 Difference]: Start difference. First operand 272 states and 904 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:34,628 INFO L93 Difference]: Finished difference Result 464 states and 1416 transitions. [2021-11-07 01:47:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:47:34,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:47:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:34,630 INFO L225 Difference]: With dead ends: 464 [2021-11-07 01:47:34,630 INFO L226 Difference]: Without dead ends: 458 [2021-11-07 01:47:34,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:47:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-07 01:47:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 284. [2021-11-07 01:47:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3286219081272086) internal successors, (942), 283 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 942 transitions. [2021-11-07 01:47:34,638 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 942 transitions. Word has length 24 [2021-11-07 01:47:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:34,638 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 942 transitions. [2021-11-07 01:47:34,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 942 transitions. [2021-11-07 01:47:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:34,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:34,639 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:34,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:34,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:34,839 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:34,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1658041895, now seen corresponding path program 26 times [2021-11-07 01:47:34,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:34,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349846738] [2021-11-07 01:47:34,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:47:34,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:34,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:34,841 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:34,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-07 01:47:37,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:47:37,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:37,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:38,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:39,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:39,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349846738] [2021-11-07 01:47:39,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349846738] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:47:39,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:47:39,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:47:39,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052831908] [2021-11-07 01:47:39,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:39,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:39,651 INFO L87 Difference]: Start difference. First operand 284 states and 942 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:40,825 INFO L93 Difference]: Finished difference Result 464 states and 1429 transitions. [2021-11-07 01:47:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:47:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:40,828 INFO L225 Difference]: With dead ends: 464 [2021-11-07 01:47:40,828 INFO L226 Difference]: Without dead ends: 464 [2021-11-07 01:47:40,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:47:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-07 01:47:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 282. [2021-11-07 01:47:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.3345195729537367) internal successors, (937), 281 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 937 transitions. [2021-11-07 01:47:40,835 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 937 transitions. Word has length 24 [2021-11-07 01:47:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:40,835 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 937 transitions. [2021-11-07 01:47:40,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:47:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 937 transitions. [2021-11-07 01:47:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:40,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:40,836 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:40,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:41,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:41,039 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:41,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash 306566212, now seen corresponding path program 27 times [2021-11-07 01:47:41,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:41,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691105398] [2021-11-07 01:47:41,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:47:41,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:41,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:41,041 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:41,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-07 01:47:44,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:47:44,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:44,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:45,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:45,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691105398] [2021-11-07 01:47:45,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691105398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:45,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:45,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:47:45,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719096110] [2021-11-07 01:47:45,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:47:45,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:45,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:47:45,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:45,356 INFO L87 Difference]: Start difference. First operand 282 states and 937 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:46,642 INFO L93 Difference]: Finished difference Result 502 states and 1538 transitions. [2021-11-07 01:47:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:47:46,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:47:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:46,644 INFO L225 Difference]: With dead ends: 502 [2021-11-07 01:47:46,644 INFO L226 Difference]: Without dead ends: 498 [2021-11-07 01:47:46,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:47:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-07 01:47:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 290. [2021-11-07 01:47:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.359861591695502) internal successors, (971), 289 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 971 transitions. [2021-11-07 01:47:46,652 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 971 transitions. Word has length 24 [2021-11-07 01:47:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:46,652 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 971 transitions. [2021-11-07 01:47:46,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 971 transitions. [2021-11-07 01:47:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:46,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:46,653 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:46,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:46,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:46,854 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:46,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1197005991, now seen corresponding path program 27 times [2021-11-07 01:47:46,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:46,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445295410] [2021-11-07 01:47:46,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:47:46,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:46,856 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:46,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-11-07 01:47:50,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:47:50,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:50,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:50,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:51,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:51,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445295410] [2021-11-07 01:47:51,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445295410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:51,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:51,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:47:51,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773035768] [2021-11-07 01:47:51,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:47:51,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:51,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:47:51,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:51,744 INFO L87 Difference]: Start difference. First operand 290 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:52,910 INFO L93 Difference]: Finished difference Result 456 states and 1400 transitions. [2021-11-07 01:47:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:47:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:47:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:52,912 INFO L225 Difference]: With dead ends: 456 [2021-11-07 01:47:52,912 INFO L226 Difference]: Without dead ends: 450 [2021-11-07 01:47:52,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:47:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-07 01:47:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 294. [2021-11-07 01:47:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.36518771331058) internal successors, (986), 293 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 986 transitions. [2021-11-07 01:47:52,920 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 986 transitions. Word has length 24 [2021-11-07 01:47:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:52,920 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 986 transitions. [2021-11-07 01:47:52,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 986 transitions. [2021-11-07 01:47:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:52,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:52,921 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:52,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:53,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:53,121 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash -39929172, now seen corresponding path program 28 times [2021-11-07 01:47:53,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:53,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930638716] [2021-11-07 01:47:53,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:47:53,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:53,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:53,123 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:53,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-07 01:47:56,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:47:56,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:56,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:56,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:56,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:47:57,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:57,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930638716] [2021-11-07 01:47:57,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930638716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:57,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:57,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:47:57,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589851370] [2021-11-07 01:47:57,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:47:57,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:57,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:47:57,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:57,348 INFO L87 Difference]: Start difference. First operand 294 states and 986 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:58,959 INFO L93 Difference]: Finished difference Result 514 states and 1599 transitions. [2021-11-07 01:47:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:47:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:47:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:58,962 INFO L225 Difference]: With dead ends: 514 [2021-11-07 01:47:58,962 INFO L226 Difference]: Without dead ends: 514 [2021-11-07 01:47:58,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:47:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-07 01:47:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 294. [2021-11-07 01:47:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.36518771331058) internal successors, (986), 293 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 986 transitions. [2021-11-07 01:47:58,972 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 986 transitions. Word has length 24 [2021-11-07 01:47:58,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:58,972 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 986 transitions. [2021-11-07 01:47:58,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:58,972 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 986 transitions. [2021-11-07 01:47:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:47:58,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:58,980 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:59,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:59,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:59,203 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:47:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1048769687, now seen corresponding path program 28 times [2021-11-07 01:47:59,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:59,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052470237] [2021-11-07 01:47:59,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:47:59,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:59,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:59,209 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:59,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-07 01:48:02,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:48:02,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:48:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:02,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:03,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:04,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:04,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052470237] [2021-11-07 01:48:04,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052470237] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:48:04,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:48:04,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:48:04,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480998107] [2021-11-07 01:48:04,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:04,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:48:04,721 INFO L87 Difference]: Start difference. First operand 294 states and 986 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:05,766 INFO L93 Difference]: Finished difference Result 444 states and 1395 transitions. [2021-11-07 01:48:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:05,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:48:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:05,770 INFO L225 Difference]: With dead ends: 444 [2021-11-07 01:48:05,770 INFO L226 Difference]: Without dead ends: 444 [2021-11-07 01:48:05,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:48:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-07 01:48:05,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 290. [2021-11-07 01:48:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.3737024221453287) internal successors, (975), 289 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 975 transitions. [2021-11-07 01:48:05,779 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 975 transitions. Word has length 24 [2021-11-07 01:48:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:05,779 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 975 transitions. [2021-11-07 01:48:05,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 975 transitions. [2021-11-07 01:48:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:05,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:05,781 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:05,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-11-07 01:48:05,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:05,982 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:05,982 INFO L85 PathProgramCache]: Analyzing trace with hash 831989542, now seen corresponding path program 29 times [2021-11-07 01:48:05,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:05,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623130208] [2021-11-07 01:48:05,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:48:05,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:05,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:05,984 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:05,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-11-07 01:48:09,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:48:09,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:48:09,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:09,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:09,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:10,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:10,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623130208] [2021-11-07 01:48:10,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623130208] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:48:10,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:48:10,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:48:10,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22594666] [2021-11-07 01:48:10,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:10,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:10,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:48:10,712 INFO L87 Difference]: Start difference. First operand 290 states and 975 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:11,867 INFO L93 Difference]: Finished difference Result 414 states and 1323 transitions. [2021-11-07 01:48:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:11,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:48:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:11,870 INFO L225 Difference]: With dead ends: 414 [2021-11-07 01:48:11,870 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 01:48:11,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:48:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 01:48:11,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 290. [2021-11-07 01:48:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.3737024221453287) internal successors, (975), 289 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 975 transitions. [2021-11-07 01:48:11,878 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 975 transitions. Word has length 24 [2021-11-07 01:48:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:11,878 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 975 transitions. [2021-11-07 01:48:11,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 975 transitions. [2021-11-07 01:48:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:11,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:11,880 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:11,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:12,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:12,092 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:12,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1007661948, now seen corresponding path program 30 times [2021-11-07 01:48:12,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:12,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838426949] [2021-11-07 01:48:12,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:48:12,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:12,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:12,094 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:12,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-07 01:48:15,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:48:15,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:48:15,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:15,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:16,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:17,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:17,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838426949] [2021-11-07 01:48:17,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838426949] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:48:17,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:48:17,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:48:17,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583972505] [2021-11-07 01:48:17,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:17,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:17,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:17,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:48:17,250 INFO L87 Difference]: Start difference. First operand 290 states and 975 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:18,275 INFO L93 Difference]: Finished difference Result 404 states and 1305 transitions. [2021-11-07 01:48:18,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:18,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:48:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:18,278 INFO L225 Difference]: With dead ends: 404 [2021-11-07 01:48:18,278 INFO L226 Difference]: Without dead ends: 404 [2021-11-07 01:48:18,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:48:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-07 01:48:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 278. [2021-11-07 01:48:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.3465703971119134) internal successors, (927), 277 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 927 transitions. [2021-11-07 01:48:18,284 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 927 transitions. Word has length 24 [2021-11-07 01:48:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:18,284 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 927 transitions. [2021-11-07 01:48:18,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 927 transitions. [2021-11-07 01:48:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:18,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:18,285 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:18,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:18,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:18,486 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:18,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1329659013, now seen corresponding path program 29 times [2021-11-07 01:48:18,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:18,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249526196] [2021-11-07 01:48:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:48:18,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:18,487 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:18,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-07 01:48:21,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:48:21,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:48:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:21,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:22,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:23,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:23,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249526196] [2021-11-07 01:48:23,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249526196] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:48:23,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:48:23,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:48:23,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448084255] [2021-11-07 01:48:23,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:23,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:23,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:48:23,899 INFO L87 Difference]: Start difference. First operand 278 states and 927 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:25,212 INFO L93 Difference]: Finished difference Result 424 states and 1320 transitions. [2021-11-07 01:48:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:48:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:25,216 INFO L225 Difference]: With dead ends: 424 [2021-11-07 01:48:25,216 INFO L226 Difference]: Without dead ends: 424 [2021-11-07 01:48:25,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:48:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-07 01:48:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 278. [2021-11-07 01:48:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.3465703971119134) internal successors, (927), 277 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 927 transitions. [2021-11-07 01:48:25,231 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 927 transitions. Word has length 24 [2021-11-07 01:48:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:25,231 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 927 transitions. [2021-11-07 01:48:25,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 927 transitions. [2021-11-07 01:48:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:25,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:25,233 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:25,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:25,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:25,447 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash -474352359, now seen corresponding path program 30 times [2021-11-07 01:48:25,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:25,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750012339] [2021-11-07 01:48:25,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:48:25,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:25,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:25,448 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:25,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-11-07 01:48:29,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:48:29,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:48:29,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:29,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:29,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:31,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:31,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750012339] [2021-11-07 01:48:31,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750012339] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:48:31,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:48:31,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:48:31,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481781764] [2021-11-07 01:48:31,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:31,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:48:31,162 INFO L87 Difference]: Start difference. First operand 278 states and 927 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:32,332 INFO L93 Difference]: Finished difference Result 410 states and 1296 transitions. [2021-11-07 01:48:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:48:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:32,334 INFO L225 Difference]: With dead ends: 410 [2021-11-07 01:48:32,335 INFO L226 Difference]: Without dead ends: 410 [2021-11-07 01:48:32,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:48:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-07 01:48:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 262. [2021-11-07 01:48:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.3026819923371646) internal successors, (862), 261 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 862 transitions. [2021-11-07 01:48:32,347 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 862 transitions. Word has length 24 [2021-11-07 01:48:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:32,347 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 862 transitions. [2021-11-07 01:48:32,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 862 transitions. [2021-11-07 01:48:32,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:32,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:32,348 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:32,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:32,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:32,549 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:32,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1430242236, now seen corresponding path program 31 times [2021-11-07 01:48:32,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:32,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867565211] [2021-11-07 01:48:32,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:48:32,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:32,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:32,551 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:32,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-07 01:48:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:35,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:35,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:36,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:36,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:36,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867565211] [2021-11-07 01:48:36,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867565211] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:48:36,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:48:36,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-07 01:48:36,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847533809] [2021-11-07 01:48:36,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:36,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:48:36,511 INFO L87 Difference]: Start difference. First operand 262 states and 862 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:37,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:37,067 INFO L93 Difference]: Finished difference Result 340 states and 1064 transitions. [2021-11-07 01:48:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:48:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:37,070 INFO L225 Difference]: With dead ends: 340 [2021-11-07 01:48:37,070 INFO L226 Difference]: Without dead ends: 340 [2021-11-07 01:48:37,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:48:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-07 01:48:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 264. [2021-11-07 01:48:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.296577946768061) internal successors, (867), 263 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 867 transitions. [2021-11-07 01:48:37,077 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 867 transitions. Word has length 24 [2021-11-07 01:48:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:37,077 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 867 transitions. [2021-11-07 01:48:37,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 867 transitions. [2021-11-07 01:48:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:37,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:37,078 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:37,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:37,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:37,279 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:37,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1397719556, now seen corresponding path program 32 times [2021-11-07 01:48:37,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:37,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860971531] [2021-11-07 01:48:37,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:48:37,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:37,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:37,280 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:37,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-07 01:48:40,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:48:40,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:48:40,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:40,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:41,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:41,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:41,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860971531] [2021-11-07 01:48:41,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860971531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:41,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:41,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 01:48:41,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458003334] [2021-11-07 01:48:41,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:48:41,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:48:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:48:41,741 INFO L87 Difference]: Start difference. First operand 264 states and 867 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:42,647 INFO L93 Difference]: Finished difference Result 362 states and 1102 transitions. [2021-11-07 01:48:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:48:42,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:48:42,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:42,649 INFO L225 Difference]: With dead ends: 362 [2021-11-07 01:48:42,649 INFO L226 Difference]: Without dead ends: 358 [2021-11-07 01:48:42,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:48:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-07 01:48:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 272. [2021-11-07 01:48:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.2767527675276753) internal successors, (888), 271 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 888 transitions. [2021-11-07 01:48:42,655 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 888 transitions. Word has length 24 [2021-11-07 01:48:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:42,656 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 888 transitions. [2021-11-07 01:48:42,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 888 transitions. [2021-11-07 01:48:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:42,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:42,657 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:42,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:42,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:42,859 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1293487478, now seen corresponding path program 33 times [2021-11-07 01:48:42,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:42,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988569055] [2021-11-07 01:48:42,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:48:42,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:42,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:42,861 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:42,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-11-07 01:48:46,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:48:46,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:48:46,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:46,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:46,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:47,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:47,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988569055] [2021-11-07 01:48:47,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988569055] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:48:47,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:48:47,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:48:47,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976333751] [2021-11-07 01:48:47,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:47,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:47,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:47,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:48:47,261 INFO L87 Difference]: Start difference. First operand 272 states and 888 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:47,883 INFO L93 Difference]: Finished difference Result 350 states and 1089 transitions. [2021-11-07 01:48:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:47,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:48:47,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:47,886 INFO L225 Difference]: With dead ends: 350 [2021-11-07 01:48:47,886 INFO L226 Difference]: Without dead ends: 350 [2021-11-07 01:48:47,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:48:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-07 01:48:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 262. [2021-11-07 01:48:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.3026819923371646) internal successors, (862), 261 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 862 transitions. [2021-11-07 01:48:47,892 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 862 transitions. Word has length 24 [2021-11-07 01:48:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:47,893 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 862 transitions. [2021-11-07 01:48:47,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:48:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 862 transitions. [2021-11-07 01:48:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:47,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:47,894 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:47,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:48,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:48,119 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:48,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2084815864, now seen corresponding path program 34 times [2021-11-07 01:48:48,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:48,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608705115] [2021-11-07 01:48:48,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:48:48,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:48,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:48,121 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:48,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-11-07 01:48:51,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:48:51,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:48:51,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:51,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:52,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:52,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608705115] [2021-11-07 01:48:52,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608705115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:52,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:52,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-07 01:48:52,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387582814] [2021-11-07 01:48:52,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:48:52,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:48:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:48:52,293 INFO L87 Difference]: Start difference. First operand 262 states and 862 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:52,831 INFO L93 Difference]: Finished difference Result 346 states and 1071 transitions. [2021-11-07 01:48:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:48:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:52,833 INFO L225 Difference]: With dead ends: 346 [2021-11-07 01:48:52,833 INFO L226 Difference]: Without dead ends: 338 [2021-11-07 01:48:52,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:48:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-07 01:48:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 264. [2021-11-07 01:48:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.296577946768061) internal successors, (867), 263 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 867 transitions. [2021-11-07 01:48:52,844 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 867 transitions. Word has length 24 [2021-11-07 01:48:52,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:52,844 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 867 transitions. [2021-11-07 01:48:52,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 867 transitions. [2021-11-07 01:48:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:52,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:52,846 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:52,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2021-11-07 01:48:53,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:53,069 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash -609713578, now seen corresponding path program 35 times [2021-11-07 01:48:53,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:53,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521841270] [2021-11-07 01:48:53,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:48:53,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:53,071 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:53,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-07 01:48:56,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:48:56,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:48:56,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:56,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:57,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:48:57,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:57,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521841270] [2021-11-07 01:48:57,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521841270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:57,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:57,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 01:48:57,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213650040] [2021-11-07 01:48:57,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:48:57,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:57,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:48:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:48:57,604 INFO L87 Difference]: Start difference. First operand 264 states and 867 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:58,652 INFO L93 Difference]: Finished difference Result 360 states and 1097 transitions. [2021-11-07 01:48:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:48:58,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:48:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:58,655 INFO L225 Difference]: With dead ends: 360 [2021-11-07 01:48:58,655 INFO L226 Difference]: Without dead ends: 356 [2021-11-07 01:48:58,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:48:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-07 01:48:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 272. [2021-11-07 01:48:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.2767527675276753) internal successors, (888), 271 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 888 transitions. [2021-11-07 01:48:58,665 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 888 transitions. Word has length 24 [2021-11-07 01:48:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:58,666 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 888 transitions. [2021-11-07 01:48:58,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 888 transitions. [2021-11-07 01:48:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:48:58,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:58,667 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:58,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:58,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:58,883 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:48:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:58,883 INFO L85 PathProgramCache]: Analyzing trace with hash 994046684, now seen corresponding path program 36 times [2021-11-07 01:48:58,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:58,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319240412] [2021-11-07 01:48:58,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:48:58,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:58,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:58,884 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:58,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-11-07 01:49:02,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:49:02,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:49:02,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:02,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:03,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:03,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:03,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319240412] [2021-11-07 01:49:03,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319240412] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:49:03,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:49:03,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:49:03,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389745308] [2021-11-07 01:49:03,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:03,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:03,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:03,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:49:03,853 INFO L87 Difference]: Start difference. First operand 272 states and 888 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:04,550 INFO L93 Difference]: Finished difference Result 344 states and 1074 transitions. [2021-11-07 01:49:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:04,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:49:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:04,553 INFO L225 Difference]: With dead ends: 344 [2021-11-07 01:49:04,553 INFO L226 Difference]: Without dead ends: 344 [2021-11-07 01:49:04,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:49:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-07 01:49:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 264. [2021-11-07 01:49:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.296577946768061) internal successors, (867), 263 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 867 transitions. [2021-11-07 01:49:04,559 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 867 transitions. Word has length 24 [2021-11-07 01:49:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:04,560 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 867 transitions. [2021-11-07 01:49:04,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 867 transitions. [2021-11-07 01:49:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:04,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:04,561 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:04,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:04,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:04,761 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1450655650, now seen corresponding path program 37 times [2021-11-07 01:49:04,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:04,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442667482] [2021-11-07 01:49:04,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:49:04,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:04,763 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:04,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-11-07 01:49:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:08,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:08,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:08,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:08,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:08,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442667482] [2021-11-07 01:49:08,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442667482] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:49:08,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:49:08,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:49:08,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403082620] [2021-11-07 01:49:08,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:08,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:49:08,949 INFO L87 Difference]: Start difference. First operand 264 states and 867 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:09,925 INFO L93 Difference]: Finished difference Result 418 states and 1280 transitions. [2021-11-07 01:49:09,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:09,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:49:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:09,928 INFO L225 Difference]: With dead ends: 418 [2021-11-07 01:49:09,928 INFO L226 Difference]: Without dead ends: 418 [2021-11-07 01:49:09,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:49:09,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-07 01:49:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 268. [2021-11-07 01:49:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.3146067415730336) internal successors, (885), 267 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 885 transitions. [2021-11-07 01:49:09,936 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 885 transitions. Word has length 24 [2021-11-07 01:49:09,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:09,937 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 885 transitions. [2021-11-07 01:49:09,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 885 transitions. [2021-11-07 01:49:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:09,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:09,937 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:09,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:10,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:10,138 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:10,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:10,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1377306142, now seen corresponding path program 38 times [2021-11-07 01:49:10,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:10,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698314136] [2021-11-07 01:49:10,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:49:10,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:10,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:10,140 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:10,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-07 01:49:13,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:49:13,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:49:13,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:13,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:14,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:14,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:14,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698314136] [2021-11-07 01:49:14,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698314136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:14,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:14,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:49:14,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28377157] [2021-11-07 01:49:14,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:49:14,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:49:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:49:14,881 INFO L87 Difference]: Start difference. First operand 268 states and 885 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:16,004 INFO L93 Difference]: Finished difference Result 424 states and 1286 transitions. [2021-11-07 01:49:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:49:16,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:49:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:16,006 INFO L225 Difference]: With dead ends: 424 [2021-11-07 01:49:16,006 INFO L226 Difference]: Without dead ends: 420 [2021-11-07 01:49:16,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:49:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-07 01:49:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 276. [2021-11-07 01:49:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.2945454545454544) internal successors, (906), 275 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 906 transitions. [2021-11-07 01:49:16,017 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 906 transitions. Word has length 24 [2021-11-07 01:49:16,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:16,017 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 906 transitions. [2021-11-07 01:49:16,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:16,018 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 906 transitions. [2021-11-07 01:49:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:16,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:16,019 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:16,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:16,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:16,231 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1313900892, now seen corresponding path program 39 times [2021-11-07 01:49:16,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:16,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991761850] [2021-11-07 01:49:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:49:16,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:16,232 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:16,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-11-07 01:49:20,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:49:20,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:49:20,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:20,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:20,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:21,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:21,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991761850] [2021-11-07 01:49:21,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991761850] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:49:21,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:49:21,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:49:21,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275671070] [2021-11-07 01:49:21,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:21,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:21,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:21,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:49:21,123 INFO L87 Difference]: Start difference. First operand 276 states and 906 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:22,133 INFO L93 Difference]: Finished difference Result 428 states and 1301 transitions. [2021-11-07 01:49:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:22,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:49:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:22,136 INFO L225 Difference]: With dead ends: 428 [2021-11-07 01:49:22,136 INFO L226 Difference]: Without dead ends: 428 [2021-11-07 01:49:22,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:49:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-07 01:49:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 272. [2021-11-07 01:49:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.3062730627306274) internal successors, (896), 271 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 896 transitions. [2021-11-07 01:49:22,146 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 896 transitions. Word has length 24 [2021-11-07 01:49:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:22,146 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 896 transitions. [2021-11-07 01:49:22,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 896 transitions. [2021-11-07 01:49:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:22,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:22,148 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:22,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:22,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:22,362 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash -115762957, now seen corresponding path program 31 times [2021-11-07 01:49:22,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:22,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273459560] [2021-11-07 01:49:22,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:49:22,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:22,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:22,364 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:22,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-11-07 01:49:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:25,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:26,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:26,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:26,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273459560] [2021-11-07 01:49:26,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273459560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:26,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:26,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:49:26,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724287836] [2021-11-07 01:49:26,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:49:26,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:49:26,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:49:26,804 INFO L87 Difference]: Start difference. First operand 272 states and 896 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:27,753 INFO L93 Difference]: Finished difference Result 402 states and 1245 transitions. [2021-11-07 01:49:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:49:27,753 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:49:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:27,754 INFO L225 Difference]: With dead ends: 402 [2021-11-07 01:49:27,754 INFO L226 Difference]: Without dead ends: 396 [2021-11-07 01:49:27,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:49:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-07 01:49:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 286. [2021-11-07 01:49:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.294736842105263) internal successors, (939), 285 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 939 transitions. [2021-11-07 01:49:27,764 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 939 transitions. Word has length 24 [2021-11-07 01:49:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:27,765 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 939 transitions. [2021-11-07 01:49:27,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 939 transitions. [2021-11-07 01:49:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:27,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:27,766 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:27,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:27,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:27,989 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:27,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1034142097, now seen corresponding path program 32 times [2021-11-07 01:49:27,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:27,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041175090] [2021-11-07 01:49:27,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:49:27,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:27,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:27,991 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:27,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-11-07 01:49:31,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:49:31,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:49:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:32,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:32,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:32,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041175090] [2021-11-07 01:49:32,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041175090] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:49:32,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:49:32,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:49:32,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185130252] [2021-11-07 01:49:32,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:32,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:49:32,918 INFO L87 Difference]: Start difference. First operand 286 states and 939 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:33,585 INFO L93 Difference]: Finished difference Result 358 states and 1135 transitions. [2021-11-07 01:49:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:49:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:33,588 INFO L225 Difference]: With dead ends: 358 [2021-11-07 01:49:33,588 INFO L226 Difference]: Without dead ends: 358 [2021-11-07 01:49:33,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:49:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-07 01:49:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 284. [2021-11-07 01:49:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3003533568904593) internal successors, (934), 283 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 934 transitions. [2021-11-07 01:49:33,593 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 934 transitions. Word has length 24 [2021-11-07 01:49:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:33,593 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 934 transitions. [2021-11-07 01:49:33,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 934 transitions. [2021-11-07 01:49:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:33,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:33,594 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:33,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:33,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:33,795 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash 693166195, now seen corresponding path program 33 times [2021-11-07 01:49:33,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:33,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924280427] [2021-11-07 01:49:33,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:49:33,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:33,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:33,796 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:33,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-11-07 01:49:37,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:49:37,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:49:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:38,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:38,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:38,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924280427] [2021-11-07 01:49:38,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924280427] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:49:38,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:49:38,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:49:38,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918792425] [2021-11-07 01:49:38,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:38,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:38,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:38,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:49:38,665 INFO L87 Difference]: Start difference. First operand 284 states and 934 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:39,320 INFO L93 Difference]: Finished difference Result 378 states and 1191 transitions. [2021-11-07 01:49:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:39,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:49:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:39,322 INFO L225 Difference]: With dead ends: 378 [2021-11-07 01:49:39,322 INFO L226 Difference]: Without dead ends: 378 [2021-11-07 01:49:39,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:49:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-07 01:49:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 282. [2021-11-07 01:49:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.306049822064057) internal successors, (929), 281 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 929 transitions. [2021-11-07 01:49:39,328 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 929 transitions. Word has length 24 [2021-11-07 01:49:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:39,329 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 929 transitions. [2021-11-07 01:49:39,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 929 transitions. [2021-11-07 01:49:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:39,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:39,329 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:39,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:39,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:39,530 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash 574729414, now seen corresponding path program 40 times [2021-11-07 01:49:39,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:39,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607658212] [2021-11-07 01:49:39,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:49:39,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:39,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:39,533 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:39,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-07 01:49:43,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:49:43,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:49:43,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:43,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:43,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:44,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:44,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607658212] [2021-11-07 01:49:44,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607658212] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:49:44,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:49:44,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:49:44,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001545274] [2021-11-07 01:49:44,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:44,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:49:44,164 INFO L87 Difference]: Start difference. First operand 282 states and 929 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:45,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:45,298 INFO L93 Difference]: Finished difference Result 412 states and 1282 transitions. [2021-11-07 01:49:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:49:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:45,301 INFO L225 Difference]: With dead ends: 412 [2021-11-07 01:49:45,301 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:49:45,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:49:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:49:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 276. [2021-11-07 01:49:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.32) internal successors, (913), 275 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 913 transitions. [2021-11-07 01:49:45,308 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 913 transitions. Word has length 24 [2021-11-07 01:49:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:45,308 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 913 transitions. [2021-11-07 01:49:45,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 913 transitions. [2021-11-07 01:49:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:45,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:45,309 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:45,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:45,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:45,510 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1209459236, now seen corresponding path program 41 times [2021-11-07 01:49:45,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:45,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888554957] [2021-11-07 01:49:45,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:49:45,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:45,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:45,512 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:45,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-11-07 01:49:49,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:49:49,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:49:49,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:49,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:49,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:50,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:50,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888554957] [2021-11-07 01:49:50,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888554957] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:49:50,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:49:50,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:49:50,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943035753] [2021-11-07 01:49:50,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:50,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:50,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:50,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:49:50,670 INFO L87 Difference]: Start difference. First operand 276 states and 913 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:51,931 INFO L93 Difference]: Finished difference Result 414 states and 1306 transitions. [2021-11-07 01:49:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:51,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:49:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:51,934 INFO L225 Difference]: With dead ends: 414 [2021-11-07 01:49:51,934 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 01:49:51,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:49:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 01:49:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 280. [2021-11-07 01:49:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.3512544802867383) internal successors, (935), 279 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 935 transitions. [2021-11-07 01:49:51,940 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 935 transitions. Word has length 24 [2021-11-07 01:49:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:51,940 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 935 transitions. [2021-11-07 01:49:51,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 935 transitions. [2021-11-07 01:49:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:51,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:51,941 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:51,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:52,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:52,142 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:52,142 INFO L85 PathProgramCache]: Analyzing trace with hash 501154072, now seen corresponding path program 42 times [2021-11-07 01:49:52,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:52,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460740819] [2021-11-07 01:49:52,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:49:52,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:52,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:52,145 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:52,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-11-07 01:49:56,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:49:56,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:49:56,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:56,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:56,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:57,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:57,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460740819] [2021-11-07 01:49:57,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460740819] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:49:57,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:49:57,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:49:57,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990360381] [2021-11-07 01:49:57,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:57,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:57,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:49:57,722 INFO L87 Difference]: Start difference. First operand 280 states and 935 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:58,976 INFO L93 Difference]: Finished difference Result 398 states and 1268 transitions. [2021-11-07 01:49:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:49:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:58,979 INFO L225 Difference]: With dead ends: 398 [2021-11-07 01:49:58,979 INFO L226 Difference]: Without dead ends: 398 [2021-11-07 01:49:58,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:49:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-07 01:49:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 272. [2021-11-07 01:49:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.302583025830258) internal successors, (895), 271 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 895 transitions. [2021-11-07 01:49:58,985 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 895 transitions. Word has length 24 [2021-11-07 01:49:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:58,985 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 895 transitions. [2021-11-07 01:49:58,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:49:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 895 transitions. [2021-11-07 01:49:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:58,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:58,986 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:59,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:59,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:59,187 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:49:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:59,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1462069482, now seen corresponding path program 43 times [2021-11-07 01:49:59,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:59,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443893184] [2021-11-07 01:49:59,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:49:59,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:59,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:59,189 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:59,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-11-07 01:50:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:02,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:50:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:03,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:04,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:04,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443893184] [2021-11-07 01:50:04,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443893184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:04,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:04,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:50:04,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497609773] [2021-11-07 01:50:04,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:50:04,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:50:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:50:04,228 INFO L87 Difference]: Start difference. First operand 272 states and 895 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:05,416 INFO L93 Difference]: Finished difference Result 470 states and 1454 transitions. [2021-11-07 01:50:05,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:50:05,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:50:05,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:05,417 INFO L225 Difference]: With dead ends: 470 [2021-11-07 01:50:05,417 INFO L226 Difference]: Without dead ends: 466 [2021-11-07 01:50:05,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:50:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-07 01:50:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 284. [2021-11-07 01:50:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3286219081272086) internal successors, (942), 283 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 942 transitions. [2021-11-07 01:50:05,428 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 942 transitions. Word has length 24 [2021-11-07 01:50:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:05,428 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 942 transitions. [2021-11-07 01:50:05,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 942 transitions. [2021-11-07 01:50:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:50:05,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:05,429 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:05,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:05,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:05,630 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:50:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash 141690780, now seen corresponding path program 44 times [2021-11-07 01:50:05,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:05,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286930368] [2021-11-07 01:50:05,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:50:05,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:05,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:05,632 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:05,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-11-07 01:50:09,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:50:09,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:09,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:50:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:10,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:11,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:11,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286930368] [2021-11-07 01:50:11,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286930368] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:50:11,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:50:11,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:50:11,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020056141] [2021-11-07 01:50:11,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:50:11,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:50:11,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:50:11,509 INFO L87 Difference]: Start difference. First operand 284 states and 942 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:50:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:12,781 INFO L93 Difference]: Finished difference Result 472 states and 1469 transitions. [2021-11-07 01:50:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:50:12,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:50:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:12,784 INFO L225 Difference]: With dead ends: 472 [2021-11-07 01:50:12,784 INFO L226 Difference]: Without dead ends: 472 [2021-11-07 01:50:12,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:50:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-07 01:50:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 282. [2021-11-07 01:50:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.3345195729537367) internal successors, (937), 281 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 937 transitions. [2021-11-07 01:50:12,791 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 937 transitions. Word has length 24 [2021-11-07 01:50:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:12,791 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 937 transitions. [2021-11-07 01:50:12,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:50:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 937 transitions. [2021-11-07 01:50:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:50:12,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:12,792 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:12,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:12,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:12,993 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:50:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:12,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1354700727, now seen corresponding path program 34 times [2021-11-07 01:50:12,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:12,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652997240] [2021-11-07 01:50:12,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:50:12,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:12,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:12,995 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:12,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2021-11-07 01:50:16,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:50:16,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:16,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:50:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:17,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:18,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:18,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652997240] [2021-11-07 01:50:18,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652997240] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:18,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:18,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:50:18,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560021036] [2021-11-07 01:50:18,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:50:18,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:18,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:50:18,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:50:18,333 INFO L87 Difference]: Start difference. First operand 282 states and 937 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:19,808 INFO L93 Difference]: Finished difference Result 468 states and 1418 transitions. [2021-11-07 01:50:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:50:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:50:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:19,810 INFO L225 Difference]: With dead ends: 468 [2021-11-07 01:50:19,810 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:50:19,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:50:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:50:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 288. [2021-11-07 01:50:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.3588850174216027) internal successors, (964), 287 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 964 transitions. [2021-11-07 01:50:19,819 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 964 transitions. Word has length 24 [2021-11-07 01:50:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:19,819 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 964 transitions. [2021-11-07 01:50:19,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 964 transitions. [2021-11-07 01:50:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:50:19,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:19,820 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:19,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:20,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:20,021 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:50:20,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:20,022 INFO L85 PathProgramCache]: Analyzing trace with hash -204795673, now seen corresponding path program 35 times [2021-11-07 01:50:20,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:20,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688869578] [2021-11-07 01:50:20,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:50:20,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:20,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:20,024 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:20,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-11-07 01:50:24,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:50:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:50:24,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:25,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:26,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:26,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688869578] [2021-11-07 01:50:26,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688869578] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:50:26,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:50:26,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:50:26,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342148434] [2021-11-07 01:50:26,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:50:26,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:50:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:50:26,352 INFO L87 Difference]: Start difference. First operand 288 states and 964 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:50:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:27,541 INFO L93 Difference]: Finished difference Result 434 states and 1335 transitions. [2021-11-07 01:50:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:50:27,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:50:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:27,544 INFO L225 Difference]: With dead ends: 434 [2021-11-07 01:50:27,544 INFO L226 Difference]: Without dead ends: 434 [2021-11-07 01:50:27,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:50:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-07 01:50:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 284. [2021-11-07 01:50:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3568904593639575) internal successors, (950), 283 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 950 transitions. [2021-11-07 01:50:27,555 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 950 transitions. Word has length 24 [2021-11-07 01:50:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:27,555 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 950 transitions. [2021-11-07 01:50:27,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:50:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 950 transitions. [2021-11-07 01:50:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:50:27,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:27,556 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:27,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:27,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:27,757 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:50:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:27,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1759812434, now seen corresponding path program 45 times [2021-11-07 01:50:27,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:27,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707842931] [2021-11-07 01:50:27,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:50:27,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:27,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:27,759 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:27,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2021-11-07 01:50:32,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:50:32,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:32,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:50:32,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:33,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:34,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:34,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707842931] [2021-11-07 01:50:34,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707842931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:34,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:34,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:50:34,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106775340] [2021-11-07 01:50:34,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:50:34,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:50:34,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:50:34,184 INFO L87 Difference]: Start difference. First operand 284 states and 950 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:35,511 INFO L93 Difference]: Finished difference Result 460 states and 1432 transitions. [2021-11-07 01:50:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:50:35,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:50:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:35,514 INFO L225 Difference]: With dead ends: 460 [2021-11-07 01:50:35,514 INFO L226 Difference]: Without dead ends: 456 [2021-11-07 01:50:35,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:50:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-07 01:50:35,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 292. [2021-11-07 01:50:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.381443298969072) internal successors, (984), 291 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 984 transitions. [2021-11-07 01:50:35,522 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 984 transitions. Word has length 24 [2021-11-07 01:50:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:35,522 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 984 transitions. [2021-11-07 01:50:35,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 984 transitions. [2021-11-07 01:50:35,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:50:35,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:35,523 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:35,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:35,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:35,723 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:50:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash 256240231, now seen corresponding path program 36 times [2021-11-07 01:50:35,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:35,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90681269] [2021-11-07 01:50:35,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:50:35,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:35,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:35,725 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:35,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-11-07 01:50:40,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:50:40,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:40,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:50:40,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:41,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:41,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:41,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90681269] [2021-11-07 01:50:41,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90681269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:41,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:41,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:50:41,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217615508] [2021-11-07 01:50:41,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:50:41,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:50:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:50:41,696 INFO L87 Difference]: Start difference. First operand 292 states and 984 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:42,951 INFO L93 Difference]: Finished difference Result 442 states and 1370 transitions. [2021-11-07 01:50:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:50:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:50:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:42,953 INFO L225 Difference]: With dead ends: 442 [2021-11-07 01:50:42,953 INFO L226 Difference]: Without dead ends: 436 [2021-11-07 01:50:42,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:50:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-07 01:50:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 296. [2021-11-07 01:50:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.386440677966102) internal successors, (999), 295 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 999 transitions. [2021-11-07 01:50:42,960 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 999 transitions. Word has length 24 [2021-11-07 01:50:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:42,961 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 999 transitions. [2021-11-07 01:50:42,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:42,961 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 999 transitions. [2021-11-07 01:50:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:50:42,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:42,962 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:42,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:43,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:43,162 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:50:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1413317050, now seen corresponding path program 46 times [2021-11-07 01:50:43,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:43,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156114879] [2021-11-07 01:50:43,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:50:43,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:43,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:43,164 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:43,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2021-11-07 01:50:47,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:50:47,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:50:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:47,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:48,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:48,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156114879] [2021-11-07 01:50:48,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156114879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:48,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:48,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:50:48,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957101327] [2021-11-07 01:50:48,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:50:48,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:48,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:50:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:50:48,554 INFO L87 Difference]: Start difference. First operand 296 states and 999 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:49,669 INFO L93 Difference]: Finished difference Result 462 states and 1467 transitions. [2021-11-07 01:50:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:50:49,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:50:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:49,672 INFO L225 Difference]: With dead ends: 462 [2021-11-07 01:50:49,672 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:50:49,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:50:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:50:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 296. [2021-11-07 01:50:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.386440677966102) internal successors, (999), 295 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 999 transitions. [2021-11-07 01:50:49,678 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 999 transitions. Word has length 24 [2021-11-07 01:50:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:49,679 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 999 transitions. [2021-11-07 01:50:49,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:49,679 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 999 transitions. [2021-11-07 01:50:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:50:49,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:49,679 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:49,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:49,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:49,880 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:50:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash 404476535, now seen corresponding path program 37 times [2021-11-07 01:50:49,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:49,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641915336] [2021-11-07 01:50:49,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:50:49,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:49,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:49,882 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:49,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2021-11-07 01:50:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:50:54,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:54,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:55,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:55,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641915336] [2021-11-07 01:50:55,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641915336] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:50:55,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:50:55,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:50:55,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247286865] [2021-11-07 01:50:55,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:50:55,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:55,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:50:55,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:50:55,876 INFO L87 Difference]: Start difference. First operand 296 states and 999 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:50:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:56,952 INFO L93 Difference]: Finished difference Result 392 states and 1262 transitions. [2021-11-07 01:50:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:50:56,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:50:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:56,955 INFO L225 Difference]: With dead ends: 392 [2021-11-07 01:50:56,955 INFO L226 Difference]: Without dead ends: 392 [2021-11-07 01:50:56,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:50:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-07 01:50:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 292. [2021-11-07 01:50:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.395189003436426) internal successors, (988), 291 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 988 transitions. [2021-11-07 01:50:56,962 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 988 transitions. Word has length 24 [2021-11-07 01:50:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:56,963 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 988 transitions. [2021-11-07 01:50:56,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:50:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 988 transitions. [2021-11-07 01:50:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:50:56,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:56,964 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:56,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:57,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:57,164 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:50:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:57,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2009731532, now seen corresponding path program 47 times [2021-11-07 01:50:57,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:57,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613986834] [2021-11-07 01:50:57,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:50:57,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:57,166 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:57,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2021-11-07 01:51:01,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:51:01,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:51:01,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:02,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:03,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:03,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613986834] [2021-11-07 01:51:03,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613986834] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:51:03,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:51:03,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:51:03,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619440723] [2021-11-07 01:51:03,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:51:03,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:03,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:51:03,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:51:03,060 INFO L87 Difference]: Start difference. First operand 292 states and 988 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:04,419 INFO L93 Difference]: Finished difference Result 464 states and 1479 transitions. [2021-11-07 01:51:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:04,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:51:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:04,422 INFO L225 Difference]: With dead ends: 464 [2021-11-07 01:51:04,422 INFO L226 Difference]: Without dead ends: 464 [2021-11-07 01:51:04,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:51:04,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-07 01:51:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 292. [2021-11-07 01:51:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.395189003436426) internal successors, (988), 291 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 988 transitions. [2021-11-07 01:51:04,431 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 988 transitions. Word has length 24 [2021-11-07 01:51:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:04,431 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 988 transitions. [2021-11-07 01:51:04,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 988 transitions. [2021-11-07 01:51:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:51:04,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:04,433 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:04,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:04,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:04,641 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:51:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:04,641 INFO L85 PathProgramCache]: Analyzing trace with hash 445584274, now seen corresponding path program 48 times [2021-11-07 01:51:04,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:04,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429374447] [2021-11-07 01:51:04,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:51:04,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:04,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:04,642 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:04,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-11-07 01:51:09,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:51:09,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:51:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:10,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:11,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:11,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429374447] [2021-11-07 01:51:11,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429374447] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:51:11,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:51:11,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:51:11,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750757284] [2021-11-07 01:51:11,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:51:11,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:51:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:51:11,180 INFO L87 Difference]: Start difference. First operand 292 states and 988 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:12,596 INFO L93 Difference]: Finished difference Result 454 states and 1461 transitions. [2021-11-07 01:51:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:51:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:12,599 INFO L225 Difference]: With dead ends: 454 [2021-11-07 01:51:12,599 INFO L226 Difference]: Without dead ends: 454 [2021-11-07 01:51:12,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:51:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-07 01:51:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 280. [2021-11-07 01:51:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.369175627240143) internal successors, (940), 279 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 940 transitions. [2021-11-07 01:51:12,607 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 940 transitions. Word has length 24 [2021-11-07 01:51:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:12,607 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 940 transitions. [2021-11-07 01:51:12,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 940 transitions. [2021-11-07 01:51:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:51:12,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:12,608 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:12,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:12,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:12,809 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:51:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:12,810 INFO L85 PathProgramCache]: Analyzing trace with hash 123587209, now seen corresponding path program 38 times [2021-11-07 01:51:12,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:12,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446014457] [2021-11-07 01:51:12,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:51:12,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:12,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:12,811 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:12,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2021-11-07 01:51:17,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:51:17,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:51:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:17,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:18,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:19,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:19,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446014457] [2021-11-07 01:51:19,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446014457] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:51:19,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:51:19,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:51:19,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171307822] [2021-11-07 01:51:19,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:51:19,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:51:19,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:51:19,518 INFO L87 Difference]: Start difference. First operand 280 states and 940 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:20,812 INFO L93 Difference]: Finished difference Result 418 states and 1314 transitions. [2021-11-07 01:51:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:51:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:20,815 INFO L225 Difference]: With dead ends: 418 [2021-11-07 01:51:20,815 INFO L226 Difference]: Without dead ends: 418 [2021-11-07 01:51:20,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:51:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-07 01:51:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 284. [2021-11-07 01:51:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3992932862190814) internal successors, (962), 283 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 962 transitions. [2021-11-07 01:51:20,823 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 962 transitions. Word has length 24 [2021-11-07 01:51:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:20,823 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 962 transitions. [2021-11-07 01:51:20,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:20,823 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 962 transitions. [2021-11-07 01:51:20,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:51:20,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:20,824 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:20,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:21,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:21,025 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:51:21,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:21,025 INFO L85 PathProgramCache]: Analyzing trace with hash 978893863, now seen corresponding path program 39 times [2021-11-07 01:51:21,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:21,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558403656] [2021-11-07 01:51:21,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:51:21,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:21,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:21,027 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:21,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-11-07 01:51:25,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:51:25,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:51:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:26,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:27,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:27,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558403656] [2021-11-07 01:51:27,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558403656] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:51:27,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:51:27,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:51:27,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951189147] [2021-11-07 01:51:27,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:51:27,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:27,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:51:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:51:27,831 INFO L87 Difference]: Start difference. First operand 284 states and 962 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:28,995 INFO L93 Difference]: Finished difference Result 404 states and 1290 transitions. [2021-11-07 01:51:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:51:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:28,998 INFO L225 Difference]: With dead ends: 404 [2021-11-07 01:51:28,998 INFO L226 Difference]: Without dead ends: 404 [2021-11-07 01:51:28,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:51:28,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-07 01:51:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 278. [2021-11-07 01:51:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.3465703971119134) internal successors, (927), 277 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 927 transitions. [2021-11-07 01:51:29,005 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 927 transitions. Word has length 24 [2021-11-07 01:51:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:29,005 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 927 transitions. [2021-11-07 01:51:29,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 927 transitions. [2021-11-07 01:51:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:51:29,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:29,006 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:29,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:29,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:29,206 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:51:29,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:29,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2011866351, now seen corresponding path program 40 times [2021-11-07 01:51:29,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:29,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784351856] [2021-11-07 01:51:29,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:51:29,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:29,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:29,208 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:29,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-11-07 01:51:33,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:51:33,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:51:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:33,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:34,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:34,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784351856] [2021-11-07 01:51:34,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784351856] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:51:34,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:51:34,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:51:34,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236501417] [2021-11-07 01:51:34,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:51:34,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:34,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:51:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:51:34,566 INFO L87 Difference]: Start difference. First operand 278 states and 927 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:35,397 INFO L93 Difference]: Finished difference Result 452 states and 1447 transitions. [2021-11-07 01:51:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:35,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:51:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:35,400 INFO L225 Difference]: With dead ends: 452 [2021-11-07 01:51:35,400 INFO L226 Difference]: Without dead ends: 452 [2021-11-07 01:51:35,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:51:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-07 01:51:35,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 282. [2021-11-07 01:51:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.3629893238434163) internal successors, (945), 281 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 945 transitions. [2021-11-07 01:51:35,408 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 945 transitions. Word has length 24 [2021-11-07 01:51:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:35,409 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 945 transitions. [2021-11-07 01:51:35,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 945 transitions. [2021-11-07 01:51:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:51:35,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:35,410 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:35,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:35,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:35,610 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:51:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:35,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1856731161, now seen corresponding path program 41 times [2021-11-07 01:51:35,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:35,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339071673] [2021-11-07 01:51:35,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:51:35,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:35,613 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:35,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-11-07 01:51:40,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:51:40,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:51:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:40,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:41,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:41,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339071673] [2021-11-07 01:51:41,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339071673] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:51:41,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:51:41,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:51:41,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214836419] [2021-11-07 01:51:41,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:51:41,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:51:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:51:41,863 INFO L87 Difference]: Start difference. First operand 282 states and 945 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:42,988 INFO L93 Difference]: Finished difference Result 450 states and 1451 transitions. [2021-11-07 01:51:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:42,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:51:42,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:42,991 INFO L225 Difference]: With dead ends: 450 [2021-11-07 01:51:42,991 INFO L226 Difference]: Without dead ends: 450 [2021-11-07 01:51:42,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:51:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-07 01:51:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 286. [2021-11-07 01:51:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.3929824561403508) internal successors, (967), 285 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 967 transitions. [2021-11-07 01:51:42,998 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 967 transitions. Word has length 24 [2021-11-07 01:51:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:42,999 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 967 transitions. [2021-11-07 01:51:42,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 967 transitions. [2021-11-07 01:51:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:51:43,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:43,000 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:43,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:43,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:43,200 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:51:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:43,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1001424507, now seen corresponding path program 42 times [2021-11-07 01:51:43,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:43,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123183012] [2021-11-07 01:51:43,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:51:43,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:43,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:43,202 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:43,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2021-11-07 01:51:48,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:51:48,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:51:48,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:48,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:48,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:49,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:49,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123183012] [2021-11-07 01:51:49,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123183012] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:51:49,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:51:49,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:51:49,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013329611] [2021-11-07 01:51:49,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:51:49,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:51:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:51:49,699 INFO L87 Difference]: Start difference. First operand 286 states and 967 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:50,644 INFO L93 Difference]: Finished difference Result 428 states and 1405 transitions. [2021-11-07 01:51:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:51:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:50,646 INFO L225 Difference]: With dead ends: 428 [2021-11-07 01:51:50,647 INFO L226 Difference]: Without dead ends: 428 [2021-11-07 01:51:50,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:51:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-07 01:51:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 276. [2021-11-07 01:51:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.330909090909091) internal successors, (916), 275 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 916 transitions. [2021-11-07 01:51:50,653 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 916 transitions. Word has length 24 [2021-11-07 01:51:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:50,653 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 916 transitions. [2021-11-07 01:51:50,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:51:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 916 transitions. [2021-11-07 01:51:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:51:50,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:50,654 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:50,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:50,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:50,859 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:51:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash -36482560, now seen corresponding path program 49 times [2021-11-07 01:51:50,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:50,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527325018] [2021-11-07 01:51:50,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:51:50,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:50,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:50,860 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:50,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-11-07 01:51:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:55,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:55,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:55,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:51:56,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:56,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527325018] [2021-11-07 01:51:56,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527325018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:56,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:56,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 01:51:56,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354516233] [2021-11-07 01:51:56,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:51:56,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:56,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:51:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:51:56,435 INFO L87 Difference]: Start difference. First operand 276 states and 916 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:57,111 INFO L93 Difference]: Finished difference Result 428 states and 1344 transitions. [2021-11-07 01:51:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:57,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:51:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:57,112 INFO L225 Difference]: With dead ends: 428 [2021-11-07 01:51:57,112 INFO L226 Difference]: Without dead ends: 420 [2021-11-07 01:51:57,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:51:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-07 01:51:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 280. [2021-11-07 01:51:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.3405017921146953) internal successors, (932), 279 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 932 transitions. [2021-11-07 01:51:57,119 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 932 transitions. Word has length 24 [2021-11-07 01:51:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:57,119 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 932 transitions. [2021-11-07 01:51:57,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 932 transitions. [2021-11-07 01:51:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:51:57,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:57,120 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:57,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:57,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:57,320 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:51:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:57,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1563955294, now seen corresponding path program 50 times [2021-11-07 01:51:57,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:57,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256735747] [2021-11-07 01:51:57,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:51:57,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:57,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:57,322 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:57,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2021-11-07 01:52:02,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:52:02,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:02,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:02,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:02,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:03,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:03,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256735747] [2021-11-07 01:52:03,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256735747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:03,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:03,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:52:03,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102630109] [2021-11-07 01:52:03,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:52:03,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:52:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:52:03,549 INFO L87 Difference]: Start difference. First operand 280 states and 932 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:04,701 INFO L93 Difference]: Finished difference Result 442 states and 1370 transitions. [2021-11-07 01:52:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:52:04,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:52:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:04,702 INFO L225 Difference]: With dead ends: 442 [2021-11-07 01:52:04,702 INFO L226 Difference]: Without dead ends: 438 [2021-11-07 01:52:04,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:52:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-07 01:52:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 288. [2021-11-07 01:52:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.3205574912891986) internal successors, (953), 287 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 953 transitions. [2021-11-07 01:52:04,711 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 953 transitions. Word has length 24 [2021-11-07 01:52:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:04,711 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 953 transitions. [2021-11-07 01:52:04,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 953 transitions. [2021-11-07 01:52:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:52:04,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:04,712 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:04,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:04,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:04,915 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:52:04,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1127251740, now seen corresponding path program 51 times [2021-11-07 01:52:04,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:04,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339043693] [2021-11-07 01:52:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:52:04,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:04,917 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:04,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2021-11-07 01:52:09,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:52:09,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:09,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:09,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:10,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:11,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:11,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339043693] [2021-11-07 01:52:11,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339043693] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:52:11,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:52:11,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:52:11,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501199875] [2021-11-07 01:52:11,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:52:11,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:52:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:52:11,387 INFO L87 Difference]: Start difference. First operand 288 states and 953 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:52:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:12,548 INFO L93 Difference]: Finished difference Result 426 states and 1347 transitions. [2021-11-07 01:52:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:52:12,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:52:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:12,551 INFO L225 Difference]: With dead ends: 426 [2021-11-07 01:52:12,551 INFO L226 Difference]: Without dead ends: 426 [2021-11-07 01:52:12,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:52:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-07 01:52:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 278. [2021-11-07 01:52:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.3465703971119134) internal successors, (927), 277 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 927 transitions. [2021-11-07 01:52:12,558 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 927 transitions. Word has length 24 [2021-11-07 01:52:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:12,558 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 927 transitions. [2021-11-07 01:52:12,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:52:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 927 transitions. [2021-11-07 01:52:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:52:12,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:12,559 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:12,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:12,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:12,759 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:52:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1057609028, now seen corresponding path program 52 times [2021-11-07 01:52:12,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:12,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825740764] [2021-11-07 01:52:12,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:52:12,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:12,761 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:12,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-11-07 01:52:17,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:52:17,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:17,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:17,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:18,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:18,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825740764] [2021-11-07 01:52:18,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825740764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:18,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:18,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 01:52:18,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005107517] [2021-11-07 01:52:18,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:52:18,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:52:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:52:18,482 INFO L87 Difference]: Start difference. First operand 278 states and 927 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:19,114 INFO L93 Difference]: Finished difference Result 416 states and 1315 transitions. [2021-11-07 01:52:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:52:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:52:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:19,116 INFO L225 Difference]: With dead ends: 416 [2021-11-07 01:52:19,116 INFO L226 Difference]: Without dead ends: 408 [2021-11-07 01:52:19,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:52:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-07 01:52:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 282. [2021-11-07 01:52:19,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.3380782918149468) internal successors, (938), 281 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 938 transitions. [2021-11-07 01:52:19,122 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 938 transitions. Word has length 24 [2021-11-07 01:52:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:19,122 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 938 transitions. [2021-11-07 01:52:19,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 938 transitions. [2021-11-07 01:52:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:52:19,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:19,123 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:19,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:19,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:19,327 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:52:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1584961502, now seen corresponding path program 53 times [2021-11-07 01:52:19,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:19,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570337249] [2021-11-07 01:52:19,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:52:19,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:19,329 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:19,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2021-11-07 01:52:24,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:52:24,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:24,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:24,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:25,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:25,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570337249] [2021-11-07 01:52:25,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570337249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:25,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:25,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:52:25,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537165584] [2021-11-07 01:52:25,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:52:25,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:25,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:52:25,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:52:25,413 INFO L87 Difference]: Start difference. First operand 282 states and 938 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:26,331 INFO L93 Difference]: Finished difference Result 428 states and 1359 transitions. [2021-11-07 01:52:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:52:26,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:52:26,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:26,333 INFO L225 Difference]: With dead ends: 428 [2021-11-07 01:52:26,333 INFO L226 Difference]: Without dead ends: 424 [2021-11-07 01:52:26,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:52:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-07 01:52:26,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 294. [2021-11-07 01:52:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.3412969283276452) internal successors, (979), 293 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 979 transitions. [2021-11-07 01:52:26,339 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 979 transitions. Word has length 24 [2021-11-07 01:52:26,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:26,340 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 979 transitions. [2021-11-07 01:52:26,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 979 transitions. [2021-11-07 01:52:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:52:26,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:26,340 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:26,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:26,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:26,541 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:52:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:26,541 INFO L85 PathProgramCache]: Analyzing trace with hash 81389299, now seen corresponding path program 43 times [2021-11-07 01:52:26,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:26,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063779353] [2021-11-07 01:52:26,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:52:26,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:26,543 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:26,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-11-07 01:52:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:31,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:31,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:32,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:32,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063779353] [2021-11-07 01:52:32,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063779353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:32,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:32,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:52:32,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150456449] [2021-11-07 01:52:32,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:52:32,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:32,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:52:32,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:52:32,150 INFO L87 Difference]: Start difference. First operand 294 states and 979 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:33,240 INFO L93 Difference]: Finished difference Result 490 states and 1554 transitions. [2021-11-07 01:52:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:52:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:52:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:33,242 INFO L225 Difference]: With dead ends: 490 [2021-11-07 01:52:33,242 INFO L226 Difference]: Without dead ends: 484 [2021-11-07 01:52:33,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:52:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-07 01:52:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 304. [2021-11-07 01:52:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.366336633663366) internal successors, (1020), 303 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1020 transitions. [2021-11-07 01:52:33,249 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1020 transitions. Word has length 24 [2021-11-07 01:52:33,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:33,249 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1020 transitions. [2021-11-07 01:52:33,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1020 transitions. [2021-11-07 01:52:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:52:33,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:33,250 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:33,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:33,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:33,451 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:52:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1238466118, now seen corresponding path program 54 times [2021-11-07 01:52:33,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:33,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900427342] [2021-11-07 01:52:33,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:52:33,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:33,452 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:33,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-11-07 01:52:38,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:52:38,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:38,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:38,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:39,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:39,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:39,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900427342] [2021-11-07 01:52:39,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900427342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:39,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:39,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:52:39,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710614193] [2021-11-07 01:52:39,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:52:39,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:39,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:52:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:52:39,978 INFO L87 Difference]: Start difference. First operand 304 states and 1020 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:40,694 INFO L93 Difference]: Finished difference Result 416 states and 1358 transitions. [2021-11-07 01:52:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:52:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:52:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:40,696 INFO L225 Difference]: With dead ends: 416 [2021-11-07 01:52:40,696 INFO L226 Difference]: Without dead ends: 416 [2021-11-07 01:52:40,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:52:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-07 01:52:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 296. [2021-11-07 01:52:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.369491525423729) internal successors, (994), 295 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 994 transitions. [2021-11-07 01:52:40,701 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 994 transitions. Word has length 24 [2021-11-07 01:52:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:40,701 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 994 transitions. [2021-11-07 01:52:40,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 994 transitions. [2021-11-07 01:52:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:52:40,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:40,702 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:40,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:40,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:40,907 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:52:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:40,907 INFO L85 PathProgramCache]: Analyzing trace with hash 229625603, now seen corresponding path program 44 times [2021-11-07 01:52:40,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:40,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660961570] [2021-11-07 01:52:40,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:52:40,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:40,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:40,908 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:40,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2021-11-07 01:52:46,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:52:46,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:46,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:46,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:47,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:47,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660961570] [2021-11-07 01:52:47,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660961570] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:52:47,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:52:47,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:52:47,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051622454] [2021-11-07 01:52:47,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:52:47,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:47,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:52:47,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:52:47,235 INFO L87 Difference]: Start difference. First operand 296 states and 994 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:52:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:47,940 INFO L93 Difference]: Finished difference Result 410 states and 1338 transitions. [2021-11-07 01:52:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:52:47,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:52:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:47,955 INFO L225 Difference]: With dead ends: 410 [2021-11-07 01:52:47,955 INFO L226 Difference]: Without dead ends: 410 [2021-11-07 01:52:47,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:52:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-07 01:52:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 288. [2021-11-07 01:52:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.3588850174216027) internal successors, (964), 287 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 964 transitions. [2021-11-07 01:52:47,963 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 964 transitions. Word has length 24 [2021-11-07 01:52:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:47,963 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 964 transitions. [2021-11-07 01:52:47,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:52:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 964 transitions. [2021-11-07 01:52:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:52:47,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:47,964 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:47,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (109)] Ended with exit code 0 [2021-11-07 01:52:48,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:48,165 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:52:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:48,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1140288333, now seen corresponding path program 45 times [2021-11-07 01:52:48,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:48,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581708121] [2021-11-07 01:52:48,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:52:48,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:48,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:48,167 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:48,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2021-11-07 01:52:53,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:52:53,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:53,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:52:54,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:54,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581708121] [2021-11-07 01:52:54,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581708121] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:52:54,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:52:54,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-07 01:52:54,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493104220] [2021-11-07 01:52:54,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:52:54,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:54,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:52:54,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:52:54,273 INFO L87 Difference]: Start difference. First operand 288 states and 964 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:52:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:54,930 INFO L93 Difference]: Finished difference Result 430 states and 1399 transitions. [2021-11-07 01:52:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:52:54,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:52:54,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:54,932 INFO L225 Difference]: With dead ends: 430 [2021-11-07 01:52:54,932 INFO L226 Difference]: Without dead ends: 430 [2021-11-07 01:52:54,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:52:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-07 01:52:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 292. [2021-11-07 01:52:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.3642611683848798) internal successors, (979), 291 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 979 transitions. [2021-11-07 01:52:54,938 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 979 transitions. Word has length 24 [2021-11-07 01:52:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:54,938 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 979 transitions. [2021-11-07 01:52:54,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:52:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 979 transitions. [2021-11-07 01:52:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:52:54,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:54,939 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:54,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:55,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:55,140 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:52:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:55,140 INFO L85 PathProgramCache]: Analyzing trace with hash 732012804, now seen corresponding path program 55 times [2021-11-07 01:52:55,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:55,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692372231] [2021-11-07 01:52:55,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:52:55,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:55,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:55,142 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:55,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-11-07 01:52:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:53:00,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:53:01,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:01,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692372231] [2021-11-07 01:53:01,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692372231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:01,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:01,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:53:01,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096286362] [2021-11-07 01:53:01,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:53:01,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:53:01,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:53:01,377 INFO L87 Difference]: Start difference. First operand 292 states and 979 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:02,534 INFO L93 Difference]: Finished difference Result 448 states and 1404 transitions. [2021-11-07 01:53:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:53:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:53:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:02,536 INFO L225 Difference]: With dead ends: 448 [2021-11-07 01:53:02,536 INFO L226 Difference]: Without dead ends: 444 [2021-11-07 01:53:02,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:53:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-07 01:53:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 304. [2021-11-07 01:53:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.386138613861386) internal successors, (1026), 303 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1026 transitions. [2021-11-07 01:53:02,542 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1026 transitions. Word has length 24 [2021-11-07 01:53:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:02,542 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1026 transitions. [2021-11-07 01:53:02,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:02,543 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1026 transitions. [2021-11-07 01:53:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:53:02,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:02,543 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:02,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:02,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:02,744 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:53:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:02,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1959194230, now seen corresponding path program 56 times [2021-11-07 01:53:02,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:02,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227810932] [2021-11-07 01:53:02,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:53:02,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:02,746 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:02,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2021-11-07 01:53:08,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:53:08,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:53:08,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:53:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:53:08,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:53:09,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:09,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227810932] [2021-11-07 01:53:09,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227810932] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:53:09,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:53:09,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:53:09,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381443775] [2021-11-07 01:53:09,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:53:09,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:53:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:53:09,746 INFO L87 Difference]: Start difference. First operand 304 states and 1026 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:53:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:11,145 INFO L93 Difference]: Finished difference Result 446 states and 1409 transitions. [2021-11-07 01:53:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:53:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:53:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:11,149 INFO L225 Difference]: With dead ends: 446 [2021-11-07 01:53:11,149 INFO L226 Difference]: Without dead ends: 446 [2021-11-07 01:53:11,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:53:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-07 01:53:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 302. [2021-11-07 01:53:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.39202657807309) internal successors, (1021), 301 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1021 transitions. [2021-11-07 01:53:11,159 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1021 transitions. Word has length 24 [2021-11-07 01:53:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:11,160 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1021 transitions. [2021-11-07 01:53:11,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:53:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1021 transitions. [2021-11-07 01:53:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:53:11,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:11,161 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:11,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (112)] Ended with exit code 0 [2021-11-07 01:53:11,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:11,371 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:53:11,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:11,371 INFO L85 PathProgramCache]: Analyzing trace with hash 839381559, now seen corresponding path program 46 times [2021-11-07 01:53:11,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:11,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267691287] [2021-11-07 01:53:11,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:53:11,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:11,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:11,372 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:11,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2021-11-07 01:53:16,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:53:16,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:53:16,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:53:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:53:16,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:53:17,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:17,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267691287] [2021-11-07 01:53:17,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267691287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:17,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:17,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:53:17,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993710837] [2021-11-07 01:53:17,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:53:17,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:53:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:53:17,571 INFO L87 Difference]: Start difference. First operand 302 states and 1021 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:18,947 INFO L93 Difference]: Finished difference Result 540 states and 1674 transitions. [2021-11-07 01:53:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:53:18,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:53:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:18,950 INFO L225 Difference]: With dead ends: 540 [2021-11-07 01:53:18,950 INFO L226 Difference]: Without dead ends: 534 [2021-11-07 01:53:18,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:53:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-07 01:53:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 308. [2021-11-07 01:53:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.413680781758958) internal successors, (1048), 307 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1048 transitions. [2021-11-07 01:53:18,958 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1048 transitions. Word has length 24 [2021-11-07 01:53:18,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:18,958 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 1048 transitions. [2021-11-07 01:53:18,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:18,958 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1048 transitions. [2021-11-07 01:53:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:53:18,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:18,959 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:18,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:19,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:19,159 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:53:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1989286613, now seen corresponding path program 47 times [2021-11-07 01:53:19,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:19,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659781221] [2021-11-07 01:53:19,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:53:19,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:19,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:19,161 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:19,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-11-07 01:53:24,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:53:24,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:53:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:53:24,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:53:24,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:53:25,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:25,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659781221] [2021-11-07 01:53:25,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659781221] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:53:25,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:53:25,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 01:53:25,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200341628] [2021-11-07 01:53:25,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:53:25,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:53:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:53:25,760 INFO L87 Difference]: Start difference. First operand 308 states and 1048 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:53:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:26,672 INFO L93 Difference]: Finished difference Result 468 states and 1502 transitions. [2021-11-07 01:53:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:53:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 24 [2021-11-07 01:53:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:26,674 INFO L225 Difference]: With dead ends: 468 [2021-11-07 01:53:26,674 INFO L226 Difference]: Without dead ends: 468 [2021-11-07 01:53:26,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:53:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-07 01:53:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 304. [2021-11-07 01:53:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.4125412541254128) internal successors, (1034), 303 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1034 transitions. [2021-11-07 01:53:26,681 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1034 transitions. Word has length 24 [2021-11-07 01:53:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:26,681 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1034 transitions. [2021-11-07 01:53:26,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-07 01:53:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1034 transitions. [2021-11-07 01:53:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:53:26,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:26,681 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:26,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:26,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:26,882 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:53:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:26,882 INFO L85 PathProgramCache]: Analyzing trace with hash -341072576, now seen corresponding path program 57 times [2021-11-07 01:53:26,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:26,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271499775] [2021-11-07 01:53:26,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:53:26,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:26,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:26,886 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:26,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b49f68f-79ef-4df9-8b14-a22ec42ed1cc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process