./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-4.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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/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 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:08:02,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:08:02,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:08:02,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:08:02,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:08:02,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:08:02,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:08:02,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:08:02,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:08:02,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:08:02,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:08:02,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:08:02,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:08:02,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:08:02,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:08:02,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:08:02,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:08:02,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:08:02,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:08:02,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:08:02,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:08:02,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:08:02,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:08:02,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:08:02,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:08:02,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:08:02,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:08:02,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:08:02,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:08:02,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:08:02,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:08:02,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:08:02,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:08:02,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:08:02,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:08:02,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:08:02,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:08:02,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:08:02,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:08:02,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:08:02,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:08:02,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:08:02,641 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:08:02,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:08:02,644 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:08:02,644 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:08:02,644 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:08:02,645 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:08:02,645 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:08:02,645 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:08:02,653 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:08:02,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:08:02,654 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:08:02,655 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:08:02,655 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:08:02,655 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:08:02,655 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:08:02,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:08:02,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:08:02,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:08:02,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:08:02,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:08:02,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:08:02,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:08:02,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:08:02,659 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:08:02,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:08:02,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:08:02,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:08:02,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:08:02,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:08:02,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:08:02,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:02,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:08:02,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:08:02,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:08:02,664 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:08:02,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:08:02,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:08:02,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:08:02,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:08:02,665 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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 [2021-11-07 02:08:03,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:08:03,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:08:03,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:08:03,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:08:03,065 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:08:03,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2021-11-07 02:08:03,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data/c026c0618/31a8d874fcca4360af6fed03b2193db0/FLAGae3a619c7 [2021-11-07 02:08:03,634 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:08:03,634 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2021-11-07 02:08:03,648 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data/c026c0618/31a8d874fcca4360af6fed03b2193db0/FLAGae3a619c7 [2021-11-07 02:08:03,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data/c026c0618/31a8d874fcca4360af6fed03b2193db0 [2021-11-07 02:08:03,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:08:03,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:08:03,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:03,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:08:03,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:08:03,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:03" (1/1) ... [2021-11-07 02:08:03,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5557db9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:03, skipping insertion in model container [2021-11-07 02:08:03,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:03" (1/1) ... [2021-11-07 02:08:03,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:08:04,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:04,218 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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2021-11-07 02:08:04,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:04,237 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 02:08:04,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7510ebd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:04, skipping insertion in model container [2021-11-07 02:08:04,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:04,239 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:08:04,241 INFO L168 Benchmark]: Toolchain (without parser) took 266.61 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 58.8 MB in the beginning and 109.2 MB in the end (delta: -50.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:08:04,242 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory was 67.0 MB in the beginning and 67.0 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:08:04,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.23 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 58.8 MB in the beginning and 109.2 MB in the end (delta: -50.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:08:04,246 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory was 67.0 MB in the beginning and 67.0 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 264.23 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 58.8 MB in the beginning and 109.2 MB in the end (delta: -50.4 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: 116]: 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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/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 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:08:06,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:08:06,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:08:06,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:08:06,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:08:06,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:08:06,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:08:06,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:08:06,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:08:06,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:08:06,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:08:06,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:08:06,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:08:06,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:08:06,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:08:06,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:08:06,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:08:06,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:08:06,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:08:06,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:08:06,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:08:06,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:08:06,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:08:06,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:08:06,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:08:06,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:08:06,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:08:06,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:08:06,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:08:06,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:08:06,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:08:06,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:08:06,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:08:06,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:08:06,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:08:06,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:08:06,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:08:06,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:08:06,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:08:06,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:08:06,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:08:06,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:08:06,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:08:06,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:08:06,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:08:06,615 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:08:06,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:08:06,615 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:08:06,616 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:08:06,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:08:06,616 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:08:06,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:08:06,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:08:06,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:08:06,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:08:06,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:08:06,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:08:06,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:08:06,620 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:08:06,620 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:08:06,621 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:08:06,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:08:06,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:08:06,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:08:06,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:08:06,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:08:06,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:08:06,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:08:06,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:06,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:08:06,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:08:06,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:08:06,624 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:08:06,624 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:06,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:08:06,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:08:06,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:08:06,625 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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 [2021-11-07 02:08:07,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:08:07,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:08:07,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:08:07,113 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:08:07,114 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:08:07,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2021-11-07 02:08:07,196 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data/5bf4fbaf0/b254434762384669bf480086ea544abe/FLAGa7f9bebc8 [2021-11-07 02:08:07,688 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:08:07,690 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2021-11-07 02:08:07,699 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data/5bf4fbaf0/b254434762384669bf480086ea544abe/FLAGa7f9bebc8 [2021-11-07 02:08:08,037 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/data/5bf4fbaf0/b254434762384669bf480086ea544abe [2021-11-07 02:08:08,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:08:08,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:08:08,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:08,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:08:08,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:08:08,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542ca0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08, skipping insertion in model container [2021-11-07 02:08:08,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:08:08,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:08,310 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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2021-11-07 02:08:08,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:08,348 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:08:08,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:08,410 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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2021-11-07 02:08:08,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:08,421 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:08:08,499 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_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2021-11-07 02:08:08,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:08,526 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:08:08,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08 WrapperNode [2021-11-07 02:08:08,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:08,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:08,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:08:08,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:08:08,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:08,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:08:08,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:08:08,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:08:08,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:08:08,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:08:08,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:08:08,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:08:08,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (1/1) ... [2021-11-07 02:08:08,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:08,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:08:08,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:08:08,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 02:08:08,760 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 02:08:08,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 02:08:08,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 02:08:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:08:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:08:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:08:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:08:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:08:08,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:08:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:08:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:08:08,765 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 02:08:09,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:08:09,480 INFO L299 CfgBuilder]: Removed 33 assume(true) statements. [2021-11-07 02:08:09,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:09 BoogieIcfgContainer [2021-11-07 02:08:09,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:08:09,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:08:09,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:08:09,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:08:09,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:08:08" (1/3) ... [2021-11-07 02:08:09,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f332ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:09, skipping insertion in model container [2021-11-07 02:08:09,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08" (2/3) ... [2021-11-07 02:08:09,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f332ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:09, skipping insertion in model container [2021-11-07 02:08:09,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:09" (3/3) ... [2021-11-07 02:08:09,490 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2021-11-07 02:08:09,495 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 02:08:09,496 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:08:09,496 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:08:09,496 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 02:08:09,533 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,533 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,534 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,534 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,534 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,534 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,536 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,536 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,536 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,536 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,537 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,537 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,537 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,537 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,537 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,538 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,538 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,538 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,538 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,539 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,539 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,539 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,539 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,540 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,540 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,540 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,540 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,540 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,541 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,541 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,541 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,541 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,541 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,543 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,545 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,545 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,545 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,545 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,546 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,546 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,546 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,546 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,547 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,547 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,547 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,547 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,548 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,548 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,548 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,548 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,548 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,549 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,549 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,549 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,549 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,550 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,550 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,550 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,550 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,550 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,551 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,551 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,551 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,551 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,551 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,551 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,552 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,552 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,552 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,552 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,553 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,553 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,553 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,554 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,554 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,554 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,554 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,555 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,555 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,555 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,555 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,555 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,556 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,556 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,556 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,556 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,557 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,557 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,558 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,558 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,558 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,559 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,559 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,559 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,559 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,559 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,560 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,560 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,560 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,560 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,561 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,561 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,561 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,561 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,561 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,562 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,562 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,562 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,562 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,563 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,563 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,563 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,563 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,563 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,564 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,564 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,564 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,564 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,564 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,564 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,565 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,566 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,566 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,566 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,567 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,567 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,569 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,569 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,569 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,570 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,571 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,571 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,571 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,572 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,572 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,572 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,572 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,572 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,573 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,573 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,573 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,573 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,573 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,574 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,574 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,574 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,574 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,575 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,575 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,575 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,575 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,575 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,575 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,595 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,596 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,596 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,597 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,597 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,597 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,597 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,597 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,598 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,598 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,598 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,598 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,599 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,599 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,599 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,599 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,599 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,600 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,600 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,600 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,600 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,600 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,601 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,601 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,602 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,602 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,602 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,603 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,603 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,603 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,603 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,603 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,604 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,604 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,604 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,605 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,606 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,606 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,606 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,606 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,606 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,607 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,607 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,607 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,607 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,608 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,608 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,608 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,608 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,612 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,612 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,613 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,613 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,613 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,613 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,614 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,618 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,618 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,619 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,619 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,619 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,619 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,619 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,620 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,620 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,620 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,620 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,621 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:08:09,630 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-07 02:08:09,688 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:08:09,698 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 02:08:09,698 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 02:08:09,723 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 02:08:09,734 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 207 transitions, 430 flow [2021-11-07 02:08:09,737 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 207 transitions, 430 flow [2021-11-07 02:08:09,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 193 places, 207 transitions, 430 flow [2021-11-07 02:08:09,874 INFO L129 PetriNetUnfolder]: 21/205 cut-off events. [2021-11-07 02:08:09,885 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-07 02:08:09,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 205 events. 21/205 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 354 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 125. Up to 2 conditions per place. [2021-11-07 02:08:09,901 INFO L116 LiptonReduction]: Number of co-enabled transitions 4932 [2021-11-07 02:08:36,176 INFO L131 LiptonReduction]: Checked pairs total: 4801 [2021-11-07 02:08:36,176 INFO L133 LiptonReduction]: Total number of compositions: 249 [2021-11-07 02:08:36,189 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 20 transitions, 56 flow [2021-11-07 02:08:36,208 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:08:36,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:36,219 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:36,220 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 446026866, now seen corresponding path program 1 times [2021-11-07 02:08:36,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:36,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494357647] [2021-11-07 02:08:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:36,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:36,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:36,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:36,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:08:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:36,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:08:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:36,599 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 02:08:36,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:36,647 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 02:08:36,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:36,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494357647] [2021-11-07 02:08:36,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494357647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:36,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:36,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:08:36,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048264128] [2021-11-07 02:08:36,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:36,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:36,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:36,698 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 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 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:36,737 INFO L93 Difference]: Finished difference Result 36 states and 76 transitions. [2021-11-07 02:08:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:36,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 02:08:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:36,749 INFO L225 Difference]: With dead ends: 36 [2021-11-07 02:08:36,749 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 02:08:36,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 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 02:08:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 02:08:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-07 02:08:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 76 transitions. [2021-11-07 02:08:36,789 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 76 transitions. Word has length 14 [2021-11-07 02:08:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:36,790 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 76 transitions. [2021-11-07 02:08:36,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 76 transitions. [2021-11-07 02:08:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:08:36,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:36,798 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:36,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:08:37,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:37,011 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:37,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1590723602, now seen corresponding path program 1 times [2021-11-07 02:08:37,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:37,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125629512] [2021-11-07 02:08:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:37,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:37,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:37,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:37,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:08:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:37,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:37,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:37,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125629512] [2021-11-07 02:08:37,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125629512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:37,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:37,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:08:37,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640997560] [2021-11-07 02:08:37,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:37,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:37,517 INFO L87 Difference]: Start difference. First operand 36 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:38,252 INFO L93 Difference]: Finished difference Result 122 states and 269 transitions. [2021-11-07 02:08:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:08:38,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:08:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:38,255 INFO L225 Difference]: With dead ends: 122 [2021-11-07 02:08:38,255 INFO L226 Difference]: Without dead ends: 122 [2021-11-07 02:08:38,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:08:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-07 02:08:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 64. [2021-11-07 02:08:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.126984126984127) internal successors, (134), 63 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 134 transitions. [2021-11-07 02:08:38,272 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 134 transitions. Word has length 15 [2021-11-07 02:08:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:38,273 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 134 transitions. [2021-11-07 02:08:38,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 134 transitions. [2021-11-07 02:08:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:08:38,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:38,275 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:38,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 02:08:38,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:38,487 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1786021598, now seen corresponding path program 2 times [2021-11-07 02:08:38,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:38,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321594633] [2021-11-07 02:08:38,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:08:38,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:38,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:38,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:38,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:08:38,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 02:08:38,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:38,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:39,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:39,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321594633] [2021-11-07 02:08:39,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321594633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:39,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:39,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:08:39,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466708375] [2021-11-07 02:08:39,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:39,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:39,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:39,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:39,023 INFO L87 Difference]: Start difference. First operand 64 states and 134 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:40,059 INFO L93 Difference]: Finished difference Result 130 states and 269 transitions. [2021-11-07 02:08:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:08:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:08:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:40,063 INFO L225 Difference]: With dead ends: 130 [2021-11-07 02:08:40,064 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 02:08:40,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:08:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 02:08:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 70. [2021-11-07 02:08:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.3333333333333335) internal successors, (161), 69 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 161 transitions. [2021-11-07 02:08:40,080 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 161 transitions. Word has length 15 [2021-11-07 02:08:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:40,081 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 161 transitions. [2021-11-07 02:08:40,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 161 transitions. [2021-11-07 02:08:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:08:40,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:40,083 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:40,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:40,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:40,283 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:40,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash 568541482, now seen corresponding path program 3 times [2021-11-07 02:08:40,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:40,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828264746] [2021-11-07 02:08:40,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:08:40,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:40,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:40,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:40,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:08:40,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-07 02:08:40,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:40,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:40,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:40,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:40,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828264746] [2021-11-07 02:08:40,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828264746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:40,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:40,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:08:40,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108205534] [2021-11-07 02:08:40,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:40,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:40,777 INFO L87 Difference]: Start difference. First operand 70 states and 161 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 02:08:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:41,592 INFO L93 Difference]: Finished difference Result 110 states and 240 transitions. [2021-11-07 02:08:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:08:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 15 [2021-11-07 02:08:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:41,595 INFO L225 Difference]: With dead ends: 110 [2021-11-07 02:08:41,595 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 02:08:41,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:08:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 02:08:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 74. [2021-11-07 02:08:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.287671232876712) internal successors, (167), 73 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 167 transitions. [2021-11-07 02:08:41,610 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 167 transitions. Word has length 15 [2021-11-07 02:08:41,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:41,610 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 167 transitions. [2021-11-07 02:08:41,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 02:08:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 167 transitions. [2021-11-07 02:08:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:08:41,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:41,612 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:41,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:41,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:41,816 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:41,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2091341076, now seen corresponding path program 4 times [2021-11-07 02:08:41,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:41,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896563341] [2021-11-07 02:08:41,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:08:41,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:41,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:41,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:41,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:08:41,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:08:41,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:42,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:42,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:42,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896563341] [2021-11-07 02:08:42,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896563341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:42,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:42,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:08:42,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458747151] [2021-11-07 02:08:42,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:42,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:42,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:42,207 INFO L87 Difference]: Start difference. First operand 74 states and 167 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:42,664 INFO L93 Difference]: Finished difference Result 138 states and 322 transitions. [2021-11-07 02:08:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:08:42,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:08:42,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:42,669 INFO L225 Difference]: With dead ends: 138 [2021-11-07 02:08:42,669 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 02:08:42,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:08:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 02:08:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2021-11-07 02:08:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5060240963855422) internal successors, (208), 83 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2021-11-07 02:08:42,679 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 15 [2021-11-07 02:08:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:42,679 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2021-11-07 02:08:42,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2021-11-07 02:08:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:08:42,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:42,681 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:42,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:42,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:42,896 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:42,897 INFO L85 PathProgramCache]: Analyzing trace with hash 986146104, now seen corresponding path program 5 times [2021-11-07 02:08:42,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:42,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325526302] [2021-11-07 02:08:42,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:08:42,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:42,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:42,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:42,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:08:43,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:08:43,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:43,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:43,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:43,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:43,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325526302] [2021-11-07 02:08:43,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325526302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:43,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:43,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:08:43,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965210590] [2021-11-07 02:08:43,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:43,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:43,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:43,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:43,377 INFO L87 Difference]: Start difference. First operand 84 states and 208 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:44,080 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-11-07 02:08:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:08:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:08:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:44,086 INFO L225 Difference]: With dead ends: 150 [2021-11-07 02:08:44,086 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 02:08:44,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:08:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 02:08:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 82. [2021-11-07 02:08:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.45679012345679) internal successors, (199), 81 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 199 transitions. [2021-11-07 02:08:44,096 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 199 transitions. Word has length 15 [2021-11-07 02:08:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:44,097 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 199 transitions. [2021-11-07 02:08:44,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 199 transitions. [2021-11-07 02:08:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:08:44,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:44,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:44,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:44,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:44,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash -775012114, now seen corresponding path program 6 times [2021-11-07 02:08:44,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:44,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234741467] [2021-11-07 02:08:44,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:08:44,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:44,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:44,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:44,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:08:44,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-11-07 02:08:44,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:44,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:44,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:44,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:44,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:44,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234741467] [2021-11-07 02:08:44,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234741467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:44,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:44,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:08:44,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73221608] [2021-11-07 02:08:44,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:44,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:44,684 INFO L87 Difference]: Start difference. First operand 82 states and 199 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:45,175 INFO L93 Difference]: Finished difference Result 140 states and 329 transitions. [2021-11-07 02:08:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:08:45,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:08:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:45,177 INFO L225 Difference]: With dead ends: 140 [2021-11-07 02:08:45,177 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 02:08:45,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:08:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 02:08:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 86. [2021-11-07 02:08:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.411764705882353) internal successors, (205), 85 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 205 transitions. [2021-11-07 02:08:45,185 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 205 transitions. Word has length 15 [2021-11-07 02:08:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:45,185 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 205 transitions. [2021-11-07 02:08:45,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 205 transitions. [2021-11-07 02:08:45,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:08:45,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:45,187 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:45,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:45,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:45,399 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 401681202, now seen corresponding path program 1 times [2021-11-07 02:08:45,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:45,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743843113] [2021-11-07 02:08:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:45,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:45,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:45,402 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:45,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:08:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:45,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:08:45,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:45,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:46,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:46,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743843113] [2021-11-07 02:08:46,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743843113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:46,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [222564570] [2021-11-07 02:08:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:46,051 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:46,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:46,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 02:08:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:46,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:46,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:46,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:46,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [222564570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:46,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297581304] [2021-11-07 02:08:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:46,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:46,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:46,720 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:46,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 02:08:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:46,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:47,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:47,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297581304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:47,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:08:47,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 14 [2021-11-07 02:08:47,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197409209] [2021-11-07 02:08:47,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:08:47,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:08:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:08:47,197 INFO L87 Difference]: Start difference. First operand 86 states and 205 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 02:08:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:48,290 INFO L93 Difference]: Finished difference Result 272 states and 618 transitions. [2021-11-07 02:08:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 02:08:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 17 [2021-11-07 02:08:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:48,294 INFO L225 Difference]: With dead ends: 272 [2021-11-07 02:08:48,295 INFO L226 Difference]: Without dead ends: 272 [2021-11-07 02:08:48,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:08:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-07 02:08:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 102. [2021-11-07 02:08:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.5445544554455446) internal successors, (257), 101 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 257 transitions. [2021-11-07 02:08:48,305 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 257 transitions. Word has length 17 [2021-11-07 02:08:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:48,306 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 257 transitions. [2021-11-07 02:08:48,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 02:08:48,306 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 257 transitions. [2021-11-07 02:08:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:08:48,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:48,308 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:48,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:48,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-07 02:08:48,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:48,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:48,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash 596979198, now seen corresponding path program 2 times [2021-11-07 02:08:48,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:48,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037511408] [2021-11-07 02:08:48,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:08:48,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:48,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:48,934 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:48,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:08:49,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:08:49,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:49,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:08:49,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:49,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:49,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:49,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037511408] [2021-11-07 02:08:49,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037511408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:49,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1155428970] [2021-11-07 02:08:49,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:08:49,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:49,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:49,656 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:49,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:08:50,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:08:50,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:50,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:50,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:50,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:50,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1155428970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:50,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676219850] [2021-11-07 02:08:50,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:08:50,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:50,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:50,631 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:50,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 02:08:50,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:08:50,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:51,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:51,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676219850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:51,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:08:51,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 19 [2021-11-07 02:08:51,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381293865] [2021-11-07 02:08:51,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 02:08:51,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 02:08:51,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:08:51,235 INFO L87 Difference]: Start difference. First operand 102 states and 257 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:53,055 INFO L93 Difference]: Finished difference Result 326 states and 697 transitions. [2021-11-07 02:08:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 02:08:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 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 17 [2021-11-07 02:08:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:53,060 INFO L225 Difference]: With dead ends: 326 [2021-11-07 02:08:53,060 INFO L226 Difference]: Without dead ends: 326 [2021-11-07 02:08:53,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:08:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-07 02:08:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 108. [2021-11-07 02:08:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.6542056074766354) internal successors, (284), 107 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 284 transitions. [2021-11-07 02:08:53,071 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 284 transitions. Word has length 17 [2021-11-07 02:08:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:53,072 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 284 transitions. [2021-11-07 02:08:53,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 284 transitions. [2021-11-07 02:08:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:08:53,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:53,074 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:53,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-07 02:08:53,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:53,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:53,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:53,688 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:53,688 INFO L85 PathProgramCache]: Analyzing trace with hash -620500918, now seen corresponding path program 3 times [2021-11-07 02:08:53,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:53,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928232356] [2021-11-07 02:08:53,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:08:53,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:53,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:53,691 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:53,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:08:54,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:08:54,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:54,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:08:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:54,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:54,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:54,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928232356] [2021-11-07 02:08:54,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928232356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:54,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118630994] [2021-11-07 02:08:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:08:54,434 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:54,436 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:54,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 02:08:54,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:08:54,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803638126] [2021-11-07 02:08:54,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:08:54,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:54,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:54,913 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:54,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 1 [2021-11-07 02:08:54,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 02:08:55,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:08:55,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:55,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:55,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:55,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803638126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:55,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:55,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 14 [2021-11-07 02:08:55,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563614097] [2021-11-07 02:08:55,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:08:55,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:08:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:08:55,605 INFO L87 Difference]: Start difference. First operand 108 states and 284 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:57,090 INFO L93 Difference]: Finished difference Result 298 states and 690 transitions. [2021-11-07 02:08:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 02:08:57,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 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 17 [2021-11-07 02:08:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:57,096 INFO L225 Difference]: With dead ends: 298 [2021-11-07 02:08:57,097 INFO L226 Difference]: Without dead ends: 298 [2021-11-07 02:08:57,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2021-11-07 02:08:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-07 02:08:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 126. [2021-11-07 02:08:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.872) internal successors, (359), 125 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 359 transitions. [2021-11-07 02:08:57,110 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 359 transitions. Word has length 17 [2021-11-07 02:08:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:57,112 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 359 transitions. [2021-11-07 02:08:57,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 359 transitions. [2021-11-07 02:08:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:08:57,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:57,120 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:57,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:57,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-07 02:08:57,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:57,521 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:08:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1152203871, now seen corresponding path program 1 times [2021-11-07 02:08:57,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:57,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962222497] [2021-11-07 02:08:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:57,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:57,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:57,523 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:57,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:08:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:57,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:08:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:57,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:58,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:58,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962222497] [2021-11-07 02:08:58,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962222497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:58,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1811429564] [2021-11-07 02:08:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:58,238 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:58,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:58,239 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:58,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:08:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:58,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:08:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:58,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:58,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1811429564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:58,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499917457] [2021-11-07 02:08:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:58,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:58,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:58,899 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:58,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 02:08:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:59,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:08:59,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:59,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:59,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499917457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:59,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:08:59,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:08:59,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066318247] [2021-11-07 02:08:59,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:08:59,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:08:59,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:08:59,431 INFO L87 Difference]: Start difference. First operand 126 states and 359 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 02:09:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:00,314 INFO L93 Difference]: Finished difference Result 250 states and 560 transitions. [2021-11-07 02:09:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 02:09:00,316 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 17 [2021-11-07 02:09:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:00,318 INFO L225 Difference]: With dead ends: 250 [2021-11-07 02:09:00,318 INFO L226 Difference]: Without dead ends: 250 [2021-11-07 02:09:00,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:09:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-07 02:09:00,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 140. [2021-11-07 02:09:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.7482014388489207) internal successors, (382), 139 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 382 transitions. [2021-11-07 02:09:00,326 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 382 transitions. Word has length 17 [2021-11-07 02:09:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:00,327 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 382 transitions. [2021-11-07 02:09:00,327 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 02:09:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 382 transitions. [2021-11-07 02:09:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:00,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:00,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:00,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:00,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:00,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:09:00,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:00,940 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1180643179, now seen corresponding path program 2 times [2021-11-07 02:09:00,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:00,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307775263] [2021-11-07 02:09:00,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:00,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:00,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:00,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:00,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:09:01,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:01,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:01,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:01,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:01,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:01,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:01,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307775263] [2021-11-07 02:09:01,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307775263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:01,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [461376493] [2021-11-07 02:09:01,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:01,807 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:01,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:01,808 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:01,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 02:09:02,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:02,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:02,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:02,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:02,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:02,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [461376493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:02,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811677393] [2021-11-07 02:09:02,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:02,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:02,580 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:02,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 02:09:02,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:02,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:02,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:02,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:03,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:03,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811677393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:03,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:03,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:09:03,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461406296] [2021-11-07 02:09:03,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:09:03,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:03,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:09:03,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:03,176 INFO L87 Difference]: Start difference. First operand 140 states and 382 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 02:09:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:04,595 INFO L93 Difference]: Finished difference Result 334 states and 764 transitions. [2021-11-07 02:09:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 02:09:04,605 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 17 [2021-11-07 02:09:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:04,608 INFO L225 Difference]: With dead ends: 334 [2021-11-07 02:09:04,608 INFO L226 Difference]: Without dead ends: 334 [2021-11-07 02:09:04,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:09:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-07 02:09:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 154. [2021-11-07 02:09:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.9084967320261437) internal successors, (445), 153 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 445 transitions. [2021-11-07 02:09:04,619 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 445 transitions. Word has length 17 [2021-11-07 02:09:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:04,619 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 445 transitions. [2021-11-07 02:09:04,619 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 02:09:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 445 transitions. [2021-11-07 02:09:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:04,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:04,621 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:04,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:04,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 02:09:05,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-07 02:09:05,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:05,224 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash -36836937, now seen corresponding path program 3 times [2021-11-07 02:09:05,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:05,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948080330] [2021-11-07 02:09:05,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:09:05,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:05,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:05,226 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:05,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:09:05,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 02:09:05,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:05,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:05,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:05,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:06,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:06,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948080330] [2021-11-07 02:09:06,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948080330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:06,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1993682025] [2021-11-07 02:09:06,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:09:06,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:06,180 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:06,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:09:06,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:09:06,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420064355] [2021-11-07 02:09:06,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:09:06,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:06,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:06,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 1 [2021-11-07 02:09:06,848 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:06,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 02:09:07,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 02:09:07,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:07,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:07,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420064355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:07,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:09:07,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2021-11-07 02:09:07,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513249519] [2021-11-07 02:09:07,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:09:07,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:07,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:09:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:07,541 INFO L87 Difference]: Start difference. First operand 154 states and 445 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 02:09:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:08,926 INFO L93 Difference]: Finished difference Result 312 states and 713 transitions. [2021-11-07 02:09:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:09:08,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 02:09:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:08,930 INFO L225 Difference]: With dead ends: 312 [2021-11-07 02:09:08,930 INFO L226 Difference]: Without dead ends: 312 [2021-11-07 02:09:08,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:09:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-07 02:09:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 148. [2021-11-07 02:09:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.8435374149659864) internal successors, (418), 147 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 418 transitions. [2021-11-07 02:09:08,939 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 418 transitions. Word has length 17 [2021-11-07 02:09:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:08,940 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 418 transitions. [2021-11-07 02:09:08,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 02:09:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 418 transitions. [2021-11-07 02:09:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:08,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:08,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:08,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:09,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:09,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:09,355 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:09,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1383492845, now seen corresponding path program 4 times [2021-11-07 02:09:09,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:09,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747275907] [2021-11-07 02:09:09,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:09:09,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:09,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:09,358 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:09,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:09:09,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:09:09,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:09,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:10,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:10,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747275907] [2021-11-07 02:09:10,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747275907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:10,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823517081] [2021-11-07 02:09:10,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:09:10,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:10,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:10,167 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:10,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 02:09:10,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:09:10,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:10,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:10,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:10,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [823517081] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:10,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293345287] [2021-11-07 02:09:10,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:09:10,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:10,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:10,903 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:10,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 02:09:11,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:09:11,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:11,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:11,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293345287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:11,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:11,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:09:11,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251581188] [2021-11-07 02:09:11,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:09:11,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:11,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:09:11,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:11,577 INFO L87 Difference]: Start difference. First operand 148 states and 418 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 02:09:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:12,670 INFO L93 Difference]: Finished difference Result 288 states and 669 transitions. [2021-11-07 02:09:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:09:12,673 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 17 [2021-11-07 02:09:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:12,675 INFO L225 Difference]: With dead ends: 288 [2021-11-07 02:09:12,676 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 02:09:12,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:09:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 02:09:12,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 150. [2021-11-07 02:09:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.865771812080537) internal successors, (427), 149 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 427 transitions. [2021-11-07 02:09:12,684 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 427 transitions. Word has length 17 [2021-11-07 02:09:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:12,684 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 427 transitions. [2021-11-07 02:09:12,684 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 02:09:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 427 transitions. [2021-11-07 02:09:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:12,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:12,685 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:12,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:12,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-07 02:09:13,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-07 02:09:13,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:13,290 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2094357406, now seen corresponding path program 1 times [2021-11-07 02:09:13,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:13,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551620945] [2021-11-07 02:09:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:13,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:13,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:13,291 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:13,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 02:09:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:13,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:14,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:14,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551620945] [2021-11-07 02:09:14,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551620945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:14,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439553259] [2021-11-07 02:09:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:14,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:14,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:14,271 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:14,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 02:09:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:14,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:14,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:14,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:15,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439553259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:15,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83452840] [2021-11-07 02:09:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:15,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:15,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:15,100 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:15,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 02:09:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:15,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:15,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:15,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83452840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:15,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:15,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:09:15,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640772976] [2021-11-07 02:09:15,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:09:15,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:09:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:15,971 INFO L87 Difference]: Start difference. First operand 150 states and 427 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 02:09:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:18,854 INFO L93 Difference]: Finished difference Result 362 states and 853 transitions. [2021-11-07 02:09:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 02:09:18,857 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 17 [2021-11-07 02:09:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:18,860 INFO L225 Difference]: With dead ends: 362 [2021-11-07 02:09:18,860 INFO L226 Difference]: Without dead ends: 362 [2021-11-07 02:09:18,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:09:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-07 02:09:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 168. [2021-11-07 02:09:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.0419161676646707) internal successors, (508), 167 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 508 transitions. [2021-11-07 02:09:18,871 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 508 transitions. Word has length 17 [2021-11-07 02:09:18,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:18,871 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 508 transitions. [2021-11-07 02:09:18,871 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 02:09:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 508 transitions. [2021-11-07 02:09:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:18,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:18,873 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:18,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-07 02:09:19,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-07 02:09:19,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-07 02:09:19,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:19,477 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash 876877290, now seen corresponding path program 2 times [2021-11-07 02:09:19,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:19,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360479861] [2021-11-07 02:09:19,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:19,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:19,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:19,479 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:19,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 02:09:20,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:20,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:20,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:20,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:20,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:20,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:20,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360479861] [2021-11-07 02:09:20,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360479861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:20,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1261935441] [2021-11-07 02:09:20,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:20,623 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:20,624 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:20,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 02:09:21,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:21,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:21,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:21,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:21,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1261935441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:21,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498075764] [2021-11-07 02:09:21,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:21,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:21,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:21,571 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:21,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 02:09:22,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:22,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:22,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:22,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:22,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498075764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:22,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:22,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:09:22,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262075135] [2021-11-07 02:09:22,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:09:22,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:09:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:22,329 INFO L87 Difference]: Start difference. First operand 168 states and 508 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 02:09:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:24,825 INFO L93 Difference]: Finished difference Result 332 states and 795 transitions. [2021-11-07 02:09:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:09:24,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 02:09:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:24,829 INFO L225 Difference]: With dead ends: 332 [2021-11-07 02:09:24,829 INFO L226 Difference]: Without dead ends: 332 [2021-11-07 02:09:24,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:09:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-07 02:09:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 164. [2021-11-07 02:09:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 3.0061349693251533) internal successors, (490), 163 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 490 transitions. [2021-11-07 02:09:24,838 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 490 transitions. Word has length 17 [2021-11-07 02:09:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:24,839 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 490 transitions. [2021-11-07 02:09:24,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 02:09:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 490 transitions. [2021-11-07 02:09:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:24,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:24,840 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:24,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:25,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-07 02:09:25,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:25,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:25,460 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:25,460 INFO L85 PathProgramCache]: Analyzing trace with hash -469778618, now seen corresponding path program 3 times [2021-11-07 02:09:25,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:25,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612720965] [2021-11-07 02:09:25,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:09:25,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:25,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:25,462 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:25,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 02:09:26,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:09:26,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:26,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:26,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:26,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:26,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612720965] [2021-11-07 02:09:26,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612720965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:26,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135102719] [2021-11-07 02:09:26,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:09:26,440 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:26,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:26,440 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:26,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 02:09:27,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:09:27,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:27,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:27,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:27,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135102719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:27,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627030486] [2021-11-07 02:09:27,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:09:27,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:27,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:27,472 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:27,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 02:09:28,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:09:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:28,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:28,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:28,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627030486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:28,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:28,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:09:28,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204532945] [2021-11-07 02:09:28,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:09:28,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:28,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:09:28,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:28,308 INFO L87 Difference]: Start difference. First operand 164 states and 490 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 02:09:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:31,105 INFO L93 Difference]: Finished difference Result 330 states and 795 transitions. [2021-11-07 02:09:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 02:09:31,108 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 17 [2021-11-07 02:09:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:31,111 INFO L225 Difference]: With dead ends: 330 [2021-11-07 02:09:31,111 INFO L226 Difference]: Without dead ends: 330 [2021-11-07 02:09:31,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2021-11-07 02:09:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-07 02:09:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 168. [2021-11-07 02:09:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.0419161676646707) internal successors, (508), 167 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 508 transitions. [2021-11-07 02:09:31,120 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 508 transitions. Word has length 17 [2021-11-07 02:09:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:31,121 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 508 transitions. [2021-11-07 02:09:31,121 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 02:09:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 508 transitions. [2021-11-07 02:09:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:31,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:31,122 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:31,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:31,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-07 02:09:31,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-07 02:09:31,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:31,740 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1797422718, now seen corresponding path program 4 times [2021-11-07 02:09:31,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:31,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865958565] [2021-11-07 02:09:31,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:09:31,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:31,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:31,742 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:31,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 02:09:32,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:09:32,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:32,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:32,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:32,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865958565] [2021-11-07 02:09:32,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865958565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:32,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [20043721] [2021-11-07 02:09:32,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:09:32,818 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:32,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:32,819 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:32,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-07 02:09:33,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:09:33,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:33,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:09:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:33,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:33,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [20043721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:33,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368116168] [2021-11-07 02:09:33,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:09:33,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:33,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:33,982 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:33,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 02:09:34,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:09:34,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:34,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:09:34,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:34,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:34,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368116168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:34,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:34,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-07 02:09:34,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843285985] [2021-11-07 02:09:34,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:09:34,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:09:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:09:34,852 INFO L87 Difference]: Start difference. First operand 168 states and 508 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:36,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:36,964 INFO L93 Difference]: Finished difference Result 290 states and 743 transitions. [2021-11-07 02:09:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 02:09:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:09:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:36,970 INFO L225 Difference]: With dead ends: 290 [2021-11-07 02:09:36,970 INFO L226 Difference]: Without dead ends: 290 [2021-11-07 02:09:36,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:09:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-07 02:09:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 176. [2021-11-07 02:09:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.04) internal successors, (532), 175 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 532 transitions. [2021-11-07 02:09:36,979 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 532 transitions. Word has length 17 [2021-11-07 02:09:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:36,980 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 532 transitions. [2021-11-07 02:09:36,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 532 transitions. [2021-11-07 02:09:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:36,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:36,981 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:37,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:37,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-11-07 02:09:37,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-11-07 02:09:37,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:37,596 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1646383262, now seen corresponding path program 4 times [2021-11-07 02:09:37,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:37,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558656210] [2021-11-07 02:09:37,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:09:37,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:37,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:37,598 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:37,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 02:09:38,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:09:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:38,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:38,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:38,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:38,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:38,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558656210] [2021-11-07 02:09:38,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558656210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:38,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [24514535] [2021-11-07 02:09:38,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:09:38,605 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:38,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:38,608 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:38,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-07 02:09:39,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:09:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:39,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:39,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:39,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:39,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [24514535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:39,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576517552] [2021-11-07 02:09:39,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:09:39,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:39,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:39,748 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:39,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 02:09:40,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:09:40,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:40,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:40,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:40,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:40,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576517552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:40,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:40,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:09:40,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455422871] [2021-11-07 02:09:40,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:09:40,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:09:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:40,628 INFO L87 Difference]: Start difference. First operand 176 states and 532 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 02:09:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:42,438 INFO L93 Difference]: Finished difference Result 302 states and 748 transitions. [2021-11-07 02:09:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:09:42,441 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 17 [2021-11-07 02:09:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:42,443 INFO L225 Difference]: With dead ends: 302 [2021-11-07 02:09:42,443 INFO L226 Difference]: Without dead ends: 302 [2021-11-07 02:09:42,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:09:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-07 02:09:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 184. [2021-11-07 02:09:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9836065573770494) internal successors, (546), 183 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 546 transitions. [2021-11-07 02:09:42,452 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 546 transitions. Word has length 17 [2021-11-07 02:09:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:42,452 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 546 transitions. [2021-11-07 02:09:42,452 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 02:09:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 546 transitions. [2021-11-07 02:09:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:42,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:42,454 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:42,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2021-11-07 02:09:42,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-07 02:09:42,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:43,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:43,059 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:43,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1734408054, now seen corresponding path program 5 times [2021-11-07 02:09:43,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:43,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043106913] [2021-11-07 02:09:43,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:09:43,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:43,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:43,061 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:43,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 02:09:43,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:43,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:43,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:43,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:44,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:44,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043106913] [2021-11-07 02:09:44,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043106913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:44,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1966164671] [2021-11-07 02:09:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:09:44,209 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:44,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:44,209 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:44,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-07 02:09:45,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:45,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:45,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:09:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:45,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:45,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1966164671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:45,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397234587] [2021-11-07 02:09:45,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:09:45,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:45,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:45,464 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:45,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 02:09:46,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:46,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:09:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:46,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:46,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397234587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:46,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:46,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-07 02:09:46,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021252039] [2021-11-07 02:09:46,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:09:46,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:09:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:09:46,460 INFO L87 Difference]: Start difference. First operand 184 states and 546 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:47,534 INFO L93 Difference]: Finished difference Result 256 states and 662 transitions. [2021-11-07 02:09:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:09:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:09:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:47,537 INFO L225 Difference]: With dead ends: 256 [2021-11-07 02:09:47,538 INFO L226 Difference]: Without dead ends: 256 [2021-11-07 02:09:47,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:09:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-07 02:09:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 194. [2021-11-07 02:09:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.917098445595855) internal successors, (563), 193 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 02:09:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 563 transitions. [2021-11-07 02:09:47,546 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 563 transitions. Word has length 17 [2021-11-07 02:09:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:47,547 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 563 transitions. [2021-11-07 02:09:47,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 563 transitions. [2021-11-07 02:09:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:47,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:47,548 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:47,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:47,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-07 02:09:47,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-07 02:09:48,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:48,153 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash -314526676, now seen corresponding path program 5 times [2021-11-07 02:09:48,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:48,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327303009] [2021-11-07 02:09:48,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:09:48,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:48,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:48,155 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:48,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-07 02:09:49,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:49,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:49,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:49,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:49,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:49,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327303009] [2021-11-07 02:09:49,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327303009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:49,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [427284613] [2021-11-07 02:09:49,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:09:49,547 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:49,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:49,548 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:49,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-07 02:09:50,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:50,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:50,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:50,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:50,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [427284613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:50,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813585243] [2021-11-07 02:09:50,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:09:50,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:50,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:50,679 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:50,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 02:09:51,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:51,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:51,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:51,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:51,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:51,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813585243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:51,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:51,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:09:51,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029682740] [2021-11-07 02:09:51,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:09:51,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:09:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:51,643 INFO L87 Difference]: Start difference. First operand 194 states and 563 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:56,495 INFO L93 Difference]: Finished difference Result 370 states and 998 transitions. [2021-11-07 02:09:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 02:09:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:09:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:56,501 INFO L225 Difference]: With dead ends: 370 [2021-11-07 02:09:56,501 INFO L226 Difference]: Without dead ends: 370 [2021-11-07 02:09:56,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:09:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-07 02:09:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 216. [2021-11-07 02:09:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0790697674418603) internal successors, (662), 215 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:56,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 662 transitions. [2021-11-07 02:09:56,512 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 662 transitions. Word has length 17 [2021-11-07 02:09:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:56,512 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 662 transitions. [2021-11-07 02:09:56,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 662 transitions. [2021-11-07 02:09:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:09:56,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:56,514 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:56,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:56,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:56,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2021-11-07 02:09:57,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:57,140 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:09:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1532006792, now seen corresponding path program 6 times [2021-11-07 02:09:57,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:57,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301409125] [2021-11-07 02:09:57,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:09:57,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:57,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:57,142 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:57,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-07 02:09:57,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:09:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:57,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:58,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:58,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:58,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301409125] [2021-11-07 02:09:58,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301409125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:58,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603613468] [2021-11-07 02:09:58,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:09:58,549 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:58,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:58,551 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:58,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-07 02:09:59,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:09:59,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:59,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:59,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:09:59,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603613468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:59,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502325689] [2021-11-07 02:09:59,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:09:59,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:59,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:59,802 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:59,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 02:10:00,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:10:00,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:00,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:00,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:00,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:00,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502325689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:00,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:00,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:10:00,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525278329] [2021-11-07 02:10:00,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:10:00,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:00,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:10:00,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:10:00,853 INFO L87 Difference]: Start difference. First operand 216 states and 662 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:03,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:03,482 INFO L93 Difference]: Finished difference Result 370 states and 994 transitions. [2021-11-07 02:10:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:10:03,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:10:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:03,489 INFO L225 Difference]: With dead ends: 370 [2021-11-07 02:10:03,489 INFO L226 Difference]: Without dead ends: 370 [2021-11-07 02:10:03,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:10:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-07 02:10:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 210. [2021-11-07 02:10:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 3.0382775119617227) internal successors, (635), 209 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 635 transitions. [2021-11-07 02:10:03,500 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 635 transitions. Word has length 17 [2021-11-07 02:10:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:03,500 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 635 transitions. [2021-11-07 02:10:03,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 635 transitions. [2021-11-07 02:10:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:03,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:03,502 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:03,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:03,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-07 02:10:03,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:04,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:04,128 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:10:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1416304596, now seen corresponding path program 7 times [2021-11-07 02:10:04,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:04,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313375528] [2021-11-07 02:10:04,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:10:04,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:04,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:04,130 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:04,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-07 02:10:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:04,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:04,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:04,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:05,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:05,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313375528] [2021-11-07 02:10:05,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313375528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:05,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1258113125] [2021-11-07 02:10:05,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:10:05,295 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:05,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:05,296 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:05,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-07 02:10:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:06,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:06,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1258113125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:06,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356503723] [2021-11-07 02:10:06,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:10:06,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:06,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:06,482 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:06,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 02:10:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:07,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:07,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:07,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356503723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:07,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:07,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:10:07,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740620268] [2021-11-07 02:10:07,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:10:07,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:10:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:10:07,533 INFO L87 Difference]: Start difference. First operand 210 states and 635 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:10,862 INFO L93 Difference]: Finished difference Result 368 states and 985 transitions. [2021-11-07 02:10:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 02:10:10,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:10:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:10,869 INFO L225 Difference]: With dead ends: 368 [2021-11-07 02:10:10,869 INFO L226 Difference]: Without dead ends: 368 [2021-11-07 02:10:10,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:10:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-07 02:10:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 214. [2021-11-07 02:10:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 3.032863849765258) internal successors, (646), 213 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 646 transitions. [2021-11-07 02:10:10,880 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 646 transitions. Word has length 17 [2021-11-07 02:10:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:10,880 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 646 transitions. [2021-11-07 02:10:10,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 646 transitions. [2021-11-07 02:10:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:10,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:10,882 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:10,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:11,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-07 02:10:11,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:11,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:11,490 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:10:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash -249882548, now seen corresponding path program 6 times [2021-11-07 02:10:11,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:11,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175180500] [2021-11-07 02:10:11,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:10:11,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:11,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:11,492 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:11,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-07 02:10:12,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:10:12,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:12,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:12,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:12,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:12,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175180500] [2021-11-07 02:10:12,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175180500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:12,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1373725163] [2021-11-07 02:10:12,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:10:12,674 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:12,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:12,675 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:12,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-07 02:10:13,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:10:13,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:13,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:13,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:13,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:13,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1373725163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:13,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195527950] [2021-11-07 02:10:13,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:10:13,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:13,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:13,993 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:13,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 02:10:14,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:10:14,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:14,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:10:14,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:15,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:15,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195527950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:15,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:15,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 18 [2021-11-07 02:10:15,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724505071] [2021-11-07 02:10:15,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:10:15,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:10:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:10:15,405 INFO L87 Difference]: Start difference. First operand 214 states and 646 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 02:10:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:17,377 INFO L93 Difference]: Finished difference Result 378 states and 1004 transitions. [2021-11-07 02:10:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 02:10:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 17 [2021-11-07 02:10:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:17,382 INFO L225 Difference]: With dead ends: 378 [2021-11-07 02:10:17,382 INFO L226 Difference]: Without dead ends: 378 [2021-11-07 02:10:17,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-11-07 02:10:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-07 02:10:17,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 230. [2021-11-07 02:10:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.1353711790393013) internal successors, (718), 229 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 718 transitions. [2021-11-07 02:10:17,391 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 718 transitions. Word has length 17 [2021-11-07 02:10:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:17,391 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 718 transitions. [2021-11-07 02:10:17,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 02:10:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 718 transitions. [2021-11-07 02:10:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:17,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:17,405 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:17,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:17,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2021-11-07 02:10:17,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-07 02:10:18,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:18,032 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:10:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1467362664, now seen corresponding path program 7 times [2021-11-07 02:10:18,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:18,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323364709] [2021-11-07 02:10:18,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:10:18,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:18,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:18,034 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:18,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-07 02:10:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:18,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:19,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:19,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:19,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323364709] [2021-11-07 02:10:19,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323364709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:19,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1736989269] [2021-11-07 02:10:19,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:10:19,343 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:19,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:19,344 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:19,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-07 02:10:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:10:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:20,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:21,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1736989269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:21,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092380688] [2021-11-07 02:10:21,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:10:21,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:21,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:21,060 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:21,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 02:10:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:22,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:10:22,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:22,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:22,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092380688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:22,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:22,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2021-11-07 02:10:22,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578815710] [2021-11-07 02:10:22,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 02:10:22,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 02:10:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:10:22,267 INFO L87 Difference]: Start difference. First operand 230 states and 718 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:24,475 INFO L93 Difference]: Finished difference Result 370 states and 993 transitions. [2021-11-07 02:10:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:10:24,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 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 17 [2021-11-07 02:10:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:24,478 INFO L225 Difference]: With dead ends: 370 [2021-11-07 02:10:24,478 INFO L226 Difference]: Without dead ends: 370 [2021-11-07 02:10:24,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:10:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-07 02:10:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 222. [2021-11-07 02:10:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.085972850678733) internal successors, (682), 221 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 682 transitions. [2021-11-07 02:10:24,496 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 682 transitions. Word has length 17 [2021-11-07 02:10:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:24,497 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 682 transitions. [2021-11-07 02:10:24,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 682 transitions. [2021-11-07 02:10:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:24,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:24,499 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:24,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:24,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:24,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2021-11-07 02:10:25,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:25,104 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:10:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -611461364, now seen corresponding path program 8 times [2021-11-07 02:10:25,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:25,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083354107] [2021-11-07 02:10:25,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:25,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:25,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:25,106 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:25,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-07 02:10:26,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:26,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:26,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:26,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:26,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:26,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:26,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083354107] [2021-11-07 02:10:26,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083354107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:26,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [560047549] [2021-11-07 02:10:26,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:26,466 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:26,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:26,468 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:26,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-11-07 02:10:27,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:27,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:10:27,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:27,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:28,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [560047549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:28,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45951229] [2021-11-07 02:10:28,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:28,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:28,078 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:28,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 02:10:29,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:29,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:10:29,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:29,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:29,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45951229] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:29,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:29,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-07 02:10:29,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049426750] [2021-11-07 02:10:29,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:10:29,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:29,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:10:29,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:10:29,289 INFO L87 Difference]: Start difference. First operand 222 states and 682 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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 02:10:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:32,186 INFO L93 Difference]: Finished difference Result 346 states and 940 transitions. [2021-11-07 02:10:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 02:10:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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 17 [2021-11-07 02:10:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:32,191 INFO L225 Difference]: With dead ends: 346 [2021-11-07 02:10:32,192 INFO L226 Difference]: Without dead ends: 346 [2021-11-07 02:10:32,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2021-11-07 02:10:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-07 02:10:32,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 224. [2021-11-07 02:10:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.098654708520179) internal successors, (691), 223 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 691 transitions. [2021-11-07 02:10:32,201 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 691 transitions. Word has length 17 [2021-11-07 02:10:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:32,202 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 691 transitions. [2021-11-07 02:10:32,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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 02:10:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 691 transitions. [2021-11-07 02:10:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:32,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:32,204 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:32,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-11-07 02:10:32,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2021-11-07 02:10:32,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:32,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:32,808 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:10:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash -762500820, now seen corresponding path program 8 times [2021-11-07 02:10:32,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:32,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992287542] [2021-11-07 02:10:32,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:32,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:32,810 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:32,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-07 02:10:33,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:33,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:33,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:33,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:33,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:34,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:34,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992287542] [2021-11-07 02:10:34,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992287542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:34,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1717902235] [2021-11-07 02:10:34,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:34,142 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:34,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:34,143 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:34,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-11-07 02:10:35,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:35,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:35,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:35,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1717902235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:35,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222472733] [2021-11-07 02:10:35,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:35,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:35,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:35,640 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:35,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 02:10:36,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:36,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:36,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:36,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:36,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222472733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:36,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:36,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:10:36,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442108738] [2021-11-07 02:10:36,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:10:36,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:10:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:10:36,857 INFO L87 Difference]: Start difference. First operand 224 states and 691 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:38,298 INFO L93 Difference]: Finished difference Result 362 states and 971 transitions. [2021-11-07 02:10:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:10:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:10:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:38,300 INFO L225 Difference]: With dead ends: 362 [2021-11-07 02:10:38,301 INFO L226 Difference]: Without dead ends: 362 [2021-11-07 02:10:38,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:10:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-07 02:10:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 228. [2021-11-07 02:10:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.0748898678414096) internal successors, (698), 227 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 698 transitions. [2021-11-07 02:10:38,310 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 698 transitions. Word has length 17 [2021-11-07 02:10:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:38,310 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 698 transitions. [2021-11-07 02:10:38,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 698 transitions. [2021-11-07 02:10:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:38,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:38,312 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:38,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:38,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-11-07 02:10:38,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:38,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:38,927 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:10:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash 151675160, now seen corresponding path program 9 times [2021-11-07 02:10:38,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:38,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843811712] [2021-11-07 02:10:38,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:10:38,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:38,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:38,929 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:38,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-07 02:10:39,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:10:39,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:39,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:40,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:40,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:40,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843811712] [2021-11-07 02:10:40,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843811712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:40,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [58349497] [2021-11-07 02:10:40,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:10:40,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:40,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:40,496 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:40,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2021-11-07 02:10:41,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:10:41,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:41,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:41,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:41,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:42,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [58349497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:42,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931093338] [2021-11-07 02:10:42,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:10:42,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:42,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:42,074 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:42,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 02:10:43,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:10:43,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:43,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:10:43,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:43,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:43,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931093338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:43,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:43,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-07 02:10:43,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255566500] [2021-11-07 02:10:43,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:10:43,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:43,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:10:43,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:10:43,549 INFO L87 Difference]: Start difference. First operand 228 states and 698 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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 02:10:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:45,783 INFO L93 Difference]: Finished difference Result 358 states and 951 transitions. [2021-11-07 02:10:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 02:10:45,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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 17 [2021-11-07 02:10:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:45,788 INFO L225 Difference]: With dead ends: 358 [2021-11-07 02:10:45,788 INFO L226 Difference]: Without dead ends: 358 [2021-11-07 02:10:45,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-11-07 02:10:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-07 02:10:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 228. [2021-11-07 02:10:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.0748898678414096) internal successors, (698), 227 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 698 transitions. [2021-11-07 02:10:45,796 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 698 transitions. Word has length 17 [2021-11-07 02:10:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:45,796 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 698 transitions. [2021-11-07 02:10:45,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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 02:10:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 698 transitions. [2021-11-07 02:10:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:45,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:45,798 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:45,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:46,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2021-11-07 02:10:46,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-07 02:10:46,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:46,404 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:10:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1141914356, now seen corresponding path program 9 times [2021-11-07 02:10:46,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:46,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365809058] [2021-11-07 02:10:46,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:10:46,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:46,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:46,406 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:46,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-07 02:10:47,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:10:47,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:47,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:47,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:47,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:47,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365809058] [2021-11-07 02:10:47,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365809058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:47,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1377563974] [2021-11-07 02:10:47,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:10:47,794 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:47,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:47,794 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:47,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2021-11-07 02:10:49,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:10:49,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:49,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:49,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:49,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:49,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1377563974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:49,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981858654] [2021-11-07 02:10:49,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:10:49,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:49,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:49,476 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:49,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-07 02:10:50,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:10:50,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:50,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:50,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:50,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981858654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:50,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:50,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:10:50,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174995565] [2021-11-07 02:10:50,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:10:50,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:10:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:10:50,867 INFO L87 Difference]: Start difference. First operand 228 states and 698 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:54,247 INFO L93 Difference]: Finished difference Result 496 states and 1348 transitions. [2021-11-07 02:10:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 02:10:54,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:10:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:54,253 INFO L225 Difference]: With dead ends: 496 [2021-11-07 02:10:54,253 INFO L226 Difference]: Without dead ends: 496 [2021-11-07 02:10:54,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:10:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-07 02:10:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 248. [2021-11-07 02:10:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.174089068825911) internal successors, (784), 247 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 784 transitions. [2021-11-07 02:10:54,263 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 784 transitions. Word has length 17 [2021-11-07 02:10:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:54,264 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 784 transitions. [2021-11-07 02:10:54,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 784 transitions. [2021-11-07 02:10:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:54,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:54,266 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:54,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-07 02:10:54,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2021-11-07 02:10:54,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2021-11-07 02:10:54,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:54,880 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:10:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1935572824, now seen corresponding path program 10 times [2021-11-07 02:10:54,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:54,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547155085] [2021-11-07 02:10:54,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:10:54,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:54,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:54,882 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:54,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-11-07 02:10:55,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:10:55,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:55,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:55,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:56,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:56,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:56,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547155085] [2021-11-07 02:10:56,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547155085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:56,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [228310387] [2021-11-07 02:10:56,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:10:56,322 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:56,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:56,323 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:56,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2021-11-07 02:10:57,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:10:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:57,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:57,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [228310387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:57,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905385080] [2021-11-07 02:10:57,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:10:57,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:57,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:57,851 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:57,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-07 02:10:59,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:10:59,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:59,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:59,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:10:59,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905385080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:59,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:59,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:10:59,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546283019] [2021-11-07 02:10:59,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:10:59,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:10:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:10:59,188 INFO L87 Difference]: Start difference. First operand 248 states and 784 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:01,610 INFO L93 Difference]: Finished difference Result 482 states and 1319 transitions. [2021-11-07 02:11:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:11:01,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:11:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:01,614 INFO L225 Difference]: With dead ends: 482 [2021-11-07 02:11:01,614 INFO L226 Difference]: Without dead ends: 482 [2021-11-07 02:11:01,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:11:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-07 02:11:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 238. [2021-11-07 02:11:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 3.1181434599156117) internal successors, (739), 237 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 739 transitions. [2021-11-07 02:11:01,621 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 739 transitions. Word has length 17 [2021-11-07 02:11:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:01,622 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 739 transitions. [2021-11-07 02:11:01,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 739 transitions. [2021-11-07 02:11:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:11:01,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:01,623 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:01,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (76)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:01,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2021-11-07 02:11:02,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-11-07 02:11:02,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:02,229 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:11:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash 588916916, now seen corresponding path program 11 times [2021-11-07 02:11:02,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:02,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202440877] [2021-11-07 02:11:02,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:11:02,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:02,231 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:02,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-11-07 02:11:03,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:11:03,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:03,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:03,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:03,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202440877] [2021-11-07 02:11:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202440877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:03,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1567513763] [2021-11-07 02:11:03,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:11:03,781 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:03,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:03,782 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:03,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2021-11-07 02:11:05,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:11:05,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:05,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:05,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1567513763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:05,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119264643] [2021-11-07 02:11:05,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:11:05,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:05,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:05,394 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:05,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-07 02:11:06,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:11:06,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:06,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:06,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:06,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119264643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:06,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:11:06,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:11:06,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902749022] [2021-11-07 02:11:06,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:11:06,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:11:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:11:06,769 INFO L87 Difference]: Start difference. First operand 238 states and 739 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:09,155 INFO L93 Difference]: Finished difference Result 466 states and 1277 transitions. [2021-11-07 02:11:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 02:11:09,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:11:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:09,161 INFO L225 Difference]: With dead ends: 466 [2021-11-07 02:11:09,161 INFO L226 Difference]: Without dead ends: 466 [2021-11-07 02:11:09,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:11:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-07 02:11:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 232. [2021-11-07 02:11:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.1298701298701297) internal successors, (723), 231 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 723 transitions. [2021-11-07 02:11:09,170 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 723 transitions. Word has length 17 [2021-11-07 02:11:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:09,170 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 723 transitions. [2021-11-07 02:11:09,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 723 transitions. [2021-11-07 02:11:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:11:09,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:09,172 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:09,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:09,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:09,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2021-11-07 02:11:09,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:09,788 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:11:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash 78321708, now seen corresponding path program 12 times [2021-11-07 02:11:09,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:09,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29419961] [2021-11-07 02:11:09,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:11:09,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:09,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:09,790 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:09,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-11-07 02:11:10,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:11:10,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:10,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:11,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:11,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:11,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29419961] [2021-11-07 02:11:11,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29419961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:11,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1396182604] [2021-11-07 02:11:11,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:11:11,286 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:11,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:11,292 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:11,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2021-11-07 02:11:12,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:11:12,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:12,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:12,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:13,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1396182604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:13,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849408735] [2021-11-07 02:11:13,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:11:13,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:13,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:13,050 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:13,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-07 02:11:14,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:11:14,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:14,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:14,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:14,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849408735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:14,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:11:14,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:11:14,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892841504] [2021-11-07 02:11:14,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:11:14,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:14,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:11:14,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:11:14,510 INFO L87 Difference]: Start difference. First operand 232 states and 723 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:16,979 INFO L93 Difference]: Finished difference Result 520 states and 1455 transitions. [2021-11-07 02:11:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 02:11:16,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:11:16,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:16,985 INFO L225 Difference]: With dead ends: 520 [2021-11-07 02:11:16,985 INFO L226 Difference]: Without dead ends: 520 [2021-11-07 02:11:16,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:11:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-07 02:11:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 246. [2021-11-07 02:11:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.220408163265306) internal successors, (789), 245 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 789 transitions. [2021-11-07 02:11:16,993 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 789 transitions. Word has length 17 [2021-11-07 02:11:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:16,994 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 789 transitions. [2021-11-07 02:11:16,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 789 transitions. [2021-11-07 02:11:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:11:16,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:16,995 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:17,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:17,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-07 02:11:17,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:17,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:17,608 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:11:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1139158408, now seen corresponding path program 13 times [2021-11-07 02:11:17,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:17,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891004647] [2021-11-07 02:11:17,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:11:17,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:17,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:17,610 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:17,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-07 02:11:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:18,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:19,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:19,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891004647] [2021-11-07 02:11:19,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891004647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:19,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1087308165] [2021-11-07 02:11:19,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:11:19,059 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:19,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:19,060 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:19,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2021-11-07 02:11:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:20,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:20,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1087308165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:20,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63377406] [2021-11-07 02:11:20,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:11:20,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:20,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:20,718 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:20,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-07 02:11:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:22,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:22,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:22,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63377406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:22,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:11:22,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:11:22,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631782745] [2021-11-07 02:11:22,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:11:22,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:11:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:11:22,175 INFO L87 Difference]: Start difference. First operand 246 states and 789 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:24,434 INFO L93 Difference]: Finished difference Result 504 states and 1419 transitions. [2021-11-07 02:11:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:11:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:11:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:24,439 INFO L225 Difference]: With dead ends: 504 [2021-11-07 02:11:24,439 INFO L226 Difference]: Without dead ends: 504 [2021-11-07 02:11:24,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:11:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-07 02:11:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 230. [2021-11-07 02:11:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.131004366812227) internal successors, (717), 229 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 717 transitions. [2021-11-07 02:11:24,447 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 717 transitions. Word has length 17 [2021-11-07 02:11:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:24,448 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 717 transitions. [2021-11-07 02:11:24,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 717 transitions. [2021-11-07 02:11:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:11:24,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:24,449 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:24,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:24,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (85)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:24,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-11-07 02:11:25,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:25,060 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:11:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1394650670, now seen corresponding path program 14 times [2021-11-07 02:11:25,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:25,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842255863] [2021-11-07 02:11:25,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:11:25,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:25,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:25,062 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:25,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-11-07 02:11:26,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:11:26,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:26,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:26,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:26,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:26,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:26,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842255863] [2021-11-07 02:11:26,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842255863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:26,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [896361750] [2021-11-07 02:11:26,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:11:26,577 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:26,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:26,578 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:26,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2021-11-07 02:11:28,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:11:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:28,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:28,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:28,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:28,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [896361750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:28,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94332879] [2021-11-07 02:11:28,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:11:28,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:28,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:28,369 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:28,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-07 02:11:29,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:11:29,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:29,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:29,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:29,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:11:29,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94332879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:29,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:11:29,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 02:11:29,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593452873] [2021-11-07 02:11:29,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:11:29,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:29,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:11:29,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:11:29,866 INFO L87 Difference]: Start difference. First operand 230 states and 717 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:31,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:31,136 INFO L93 Difference]: Finished difference Result 458 states and 1305 transitions. [2021-11-07 02:11:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:11:31,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:11:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:31,141 INFO L225 Difference]: With dead ends: 458 [2021-11-07 02:11:31,142 INFO L226 Difference]: Without dead ends: 458 [2021-11-07 02:11:31,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:11:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-07 02:11:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 230. [2021-11-07 02:11:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.131004366812227) internal successors, (717), 229 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 717 transitions. [2021-11-07 02:11:31,152 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 717 transitions. Word has length 17 [2021-11-07 02:11:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:31,153 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 717 transitions. [2021-11-07 02:11:31,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 717 transitions. [2021-11-07 02:11:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:11:31,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:31,154 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:31,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:31,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2021-11-07 02:11:31,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2021-11-07 02:11:31,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:31,780 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 02:11:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash -104257714, now seen corresponding path program 10 times [2021-11-07 02:11:31,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:31,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617145702] [2021-11-07 02:11:31,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:11:31,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:31,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:31,782 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:31,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-11-07 02:11:33,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:11:33,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:33,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 02:11:33,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:43,573 WARN L207 SmtUtils]: Spent 22.17 s on a formula simplification that was a NOOP. DAG size: 63 [2021-11-07 02:13:38,311 WARN L207 SmtUtils]: Spent 22.18 s on a formula simplification that was a NOOP. DAG size: 63 [2021-11-07 02:13:42,118 INFO L354 Elim1Store]: treesize reduction 570, result has 4.2 percent of original size [2021-11-07 02:13:42,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 1386 treesize of output 219 [2021-11-07 02:13:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:42,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:59,642 WARN L207 SmtUtils]: Spent 10.59 s on a formula simplification. DAG size of input: 814 DAG size of output: 214 [2021-11-07 02:13:59,646 INFO L354 Elim1Store]: treesize reduction 2472, result has 16.6 percent of original size [2021-11-07 02:13:59,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 24 new quantified variables, introduced 190 case distinctions, treesize of input 687 treesize of output 864 [2021-11-07 02:17:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:11,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:11,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617145702] [2021-11-07 02:17:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617145702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:11,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653715355] [2021-11-07 02:17:11,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:17:11,921 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:11,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:11,923 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:11,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2021-11-07 02:17:13,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:17:13,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:17:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:17:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:17:14,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:17:15,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1653715355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:15,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426886790] [2021-11-07 02:17:15,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:17:15,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:17:15,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:17:15,033 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:17:15,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e460af7-1bbe-4e65-b74a-81eb4c22a9ee/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-07 02:17:16,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:17:16,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:17:16,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:17:16,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:17:16,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:17:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426886790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:17,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:17:17,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 7, 7] total 24 [2021-11-07 02:17:17,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515730937] [2021-11-07 02:17:17,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 02:17:17,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 02:17:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=472, Unknown=4, NotChecked=0, Total=552 [2021-11-07 02:17:17,011 INFO L87 Difference]: Start difference. First operand 230 states and 717 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:18,443 WARN L207 SmtUtils]: Spent 22.18 s on a formula simplification that was a NOOP. DAG size: 70 [2021-11-07 02:19:28,120 WARN L207 SmtUtils]: Spent 20.34 s on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-11-07 02:19:58,915 WARN L207 SmtUtils]: Spent 22.17 s on a formula simplification that was a NOOP. DAG size: 65 [2021-11-07 02:20:30,159 WARN L207 SmtUtils]: Spent 20.42 s on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2021-11-07 02:20:59,079 WARN L207 SmtUtils]: Spent 22.21 s on a formula simplification that was a NOOP. DAG size: 72