./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/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 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:05:25,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:05:25,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:05:25,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:05:25,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:05:25,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:05:25,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:05:25,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:05:25,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:05:25,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:05:25,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:05:25,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:05:25,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:05:25,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:05:25,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:05:25,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:05:25,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:05:25,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:05:25,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:05:25,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:05:25,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:05:25,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:05:25,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:05:25,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:05:25,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:05:25,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:05:25,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:05:25,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:05:25,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:05:25,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:05:25,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:05:25,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:05:25,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:05:25,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:05:25,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:05:25,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:05:25,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:05:25,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:05:25,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:05:25,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:05:25,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:05:25,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:05:25,653 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:05:25,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:05:25,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:05:25,655 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:05:25,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:05:25,655 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:05:25,655 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:05:25,655 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:05:25,661 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:05:25,662 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:05:25,663 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:05:25,663 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:05:25,663 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:05:25,663 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:05:25,663 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:05:25,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:05:25,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:05:25,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:05:25,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:05:25,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:05:25,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:05:25,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:05:25,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:05:25,666 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:05:25,666 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:05:25,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:05:25,666 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:05:25,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:05:25,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:05:25,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:05:25,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:25,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:05:25,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:05:25,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:05:25,669 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:05:25,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:05:25,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:05:25,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:05:25,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:05:25,670 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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb [2021-11-07 02:05:26,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:05:26,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:05:26,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:05:26,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:05:26,044 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:05:26,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-07 02:05:26,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data/ee18e0e4d/7ac909e1612144af884d341ebdafc7ba/FLAGae16a2152 [2021-11-07 02:05:26,805 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:05:26,808 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-07 02:05:26,833 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data/ee18e0e4d/7ac909e1612144af884d341ebdafc7ba/FLAGae16a2152 [2021-11-07 02:05:26,995 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data/ee18e0e4d/7ac909e1612144af884d341ebdafc7ba [2021-11-07 02:05:26,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:05:26,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:05:27,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:27,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:05:27,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:05:27,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:26" (1/1) ... [2021-11-07 02:05:27,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2b8d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:27, skipping insertion in model container [2021-11-07 02:05:27,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:26" (1/1) ... [2021-11-07 02:05:27,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:05:27,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:27,364 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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-07 02:05:27,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:27,747 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 02:05:27,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@420944db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:27, skipping insertion in model container [2021-11-07 02:05:27,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:27,748 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:05:27,750 INFO L168 Benchmark]: Toolchain (without parser) took 750.08 ms. Allocated memory is still 113.2 MB. Free memory was 72.4 MB in the beginning and 74.3 MB in the end (delta: -1.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:05:27,752 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 113.2 MB. Free memory was 91.5 MB in the beginning and 91.4 MB in the end (delta: 64.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:05:27,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 733.15 ms. Allocated memory is still 113.2 MB. Free memory was 72.2 MB in the beginning and 74.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:05:27,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 113.2 MB. Free memory was 91.5 MB in the beginning and 91.4 MB in the end (delta: 64.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 733.15 ms. Allocated memory is still 113.2 MB. Free memory was 72.2 MB in the beginning and 74.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/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 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:05:29,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:05:29,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:05:29,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:05:29,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:05:29,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:05:29,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:05:29,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:05:29,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:05:29,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:05:29,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:05:29,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:05:29,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:05:29,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:05:29,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:05:30,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:05:30,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:05:30,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:05:30,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:05:30,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:05:30,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:05:30,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:05:30,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:05:30,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:05:30,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:05:30,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:05:30,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:05:30,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:05:30,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:05:30,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:05:30,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:05:30,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:05:30,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:05:30,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:05:30,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:05:30,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:05:30,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:05:30,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:05:30,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:05:30,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:05:30,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:05:30,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:05:30,097 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:05:30,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:05:30,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:05:30,099 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:05:30,099 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:05:30,099 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:05:30,099 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:05:30,100 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:05:30,100 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:05:30,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:05:30,102 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:05:30,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:05:30,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:05:30,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:05:30,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:05:30,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:05:30,104 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:05:30,104 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:05:30,104 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:05:30,104 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:05:30,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:05:30,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:05:30,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:05:30,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:05:30,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:05:30,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:05:30,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:30,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:05:30,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:05:30,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:05:30,107 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:05:30,107 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:30,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:05:30,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:05:30,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:05:30,108 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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb [2021-11-07 02:05:30,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:05:30,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:05:30,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:05:30,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:05:30,511 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:05:30,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-07 02:05:30,587 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data/6d1f25bec/ef03bc5790ba4215b773e7005b8bcb71/FLAG3e4c96e71 [2021-11-07 02:05:31,366 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:05:31,367 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-07 02:05:31,397 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data/6d1f25bec/ef03bc5790ba4215b773e7005b8bcb71/FLAG3e4c96e71 [2021-11-07 02:05:31,608 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/data/6d1f25bec/ef03bc5790ba4215b773e7005b8bcb71 [2021-11-07 02:05:31,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:05:31,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:05:31,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:31,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:05:31,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:05:31,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:31" (1/1) ... [2021-11-07 02:05:31,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657941c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:31, skipping insertion in model container [2021-11-07 02:05:31,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:31" (1/1) ... [2021-11-07 02:05:31,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:05:31,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:32,047 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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-07 02:05:32,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:32,394 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:05:32,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:32,461 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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-07 02:05:32,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:32,629 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:05:32,681 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_ca094842-b7a8-4957-b94b-d3b11c3c2a28/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-07 02:05:32,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:32,807 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:05:32,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32 WrapperNode [2021-11-07 02:05:32,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:32,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:05:32,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:05:32,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:05:32,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:32,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:33,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:05:33,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:05:33,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:05:33,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:05:33,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:33,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:33,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:33,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:33,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:33,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:33,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:33,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:05:33,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:05:33,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:05:33,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:05:33,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (1/1) ... [2021-11-07 02:05:33,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:33,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:05:33,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:05:33,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:05:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:05:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:05:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:05:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:05:44,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:05:44,189 INFO L299 CfgBuilder]: Removed 881 assume(true) statements. [2021-11-07 02:05:44,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:44 BoogieIcfgContainer [2021-11-07 02:05:44,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:05:44,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:05:44,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:05:44,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:05:44,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:05:31" (1/3) ... [2021-11-07 02:05:44,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf3ebe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:44, skipping insertion in model container [2021-11-07 02:05:44,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:32" (2/3) ... [2021-11-07 02:05:44,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf3ebe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:44, skipping insertion in model container [2021-11-07 02:05:44,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:44" (3/3) ... [2021-11-07 02:05:44,203 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2021-11-07 02:05:44,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:05:44,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:05:44,271 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:05:44,277 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 02:05:44,277 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:05:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 3675 states, 3669 states have (on average 1.8844371763423275) internal successors, (6914), 3674 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:05:44,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:44,377 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:44,378 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:05:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash -183688650, now seen corresponding path program 1 times [2021-11-07 02:05:44,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:44,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991243308] [2021-11-07 02:05:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:44,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:44,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:44,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:44,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:05:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:44,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:05:44,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:45,027 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 02:05:45,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:45,125 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 02:05:45,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:45,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991243308] [2021-11-07 02:05:45,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991243308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:45,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:45,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:05:45,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023078367] [2021-11-07 02:05:45,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:05:45,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:45,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:05:45,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:05:45,162 INFO L87 Difference]: Start difference. First operand has 3675 states, 3669 states have (on average 1.8844371763423275) internal successors, (6914), 3674 states have internal predecessors, (6914), 0 states have call successors, (0), 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 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:45,372 INFO L93 Difference]: Finished difference Result 3694 states and 6937 transitions. [2021-11-07 02:05:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:05:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 02:05:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:45,413 INFO L225 Difference]: With dead ends: 3694 [2021-11-07 02:05:45,413 INFO L226 Difference]: Without dead ends: 3671 [2021-11-07 02:05:45,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:05:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-11-07 02:05:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3671. [2021-11-07 02:05:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3666 states have (on average 1.8827059465357339) internal successors, (6902), 3670 states have internal predecessors, (6902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 6902 transitions. [2021-11-07 02:05:45,624 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 6902 transitions. Word has length 53 [2021-11-07 02:05:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:45,625 INFO L470 AbstractCegarLoop]: Abstraction has 3671 states and 6902 transitions. [2021-11-07 02:05:45,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 6902 transitions. [2021-11-07 02:05:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:05:45,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:45,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:45,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:45,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:45,846 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:05:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:45,846 INFO L85 PathProgramCache]: Analyzing trace with hash -20779449, now seen corresponding path program 1 times [2021-11-07 02:05:45,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:45,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971088978] [2021-11-07 02:05:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:45,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:45,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:45,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:45,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:05:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:46,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:05:46,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:46,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:46,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:46,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971088978] [2021-11-07 02:05:46,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971088978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:46,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:46,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:46,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124188939] [2021-11-07 02:05:46,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:46,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:46,567 INFO L87 Difference]: Start difference. First operand 3671 states and 6902 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 02:05:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:47,060 INFO L93 Difference]: Finished difference Result 10933 states and 20563 transitions. [2021-11-07 02:05:47,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:47,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:05:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:47,107 INFO L225 Difference]: With dead ends: 10933 [2021-11-07 02:05:47,108 INFO L226 Difference]: Without dead ends: 7275 [2021-11-07 02:05:47,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 02:05:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7275 states. [2021-11-07 02:05:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7275 to 3671. [2021-11-07 02:05:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3666 states have (on average 1.880796508456083) internal successors, (6895), 3670 states have internal predecessors, (6895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 6895 transitions. [2021-11-07 02:05:47,292 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 6895 transitions. Word has length 55 [2021-11-07 02:05:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:47,292 INFO L470 AbstractCegarLoop]: Abstraction has 3671 states and 6895 transitions. [2021-11-07 02:05:47,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 02:05:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 6895 transitions. [2021-11-07 02:05:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:05:47,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:47,297 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:47,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:47,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:47,514 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:05:47,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1712167708, now seen corresponding path program 1 times [2021-11-07 02:05:47,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:47,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493680923] [2021-11-07 02:05:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:47,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:47,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:47,518 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:47,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:05:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:47,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:05:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:48,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:48,275 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 02:05:48,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:48,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493680923] [2021-11-07 02:05:48,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493680923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:48,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:48,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:48,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126020051] [2021-11-07 02:05:48,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:48,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:48,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:48,278 INFO L87 Difference]: Start difference. First operand 3671 states and 6895 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:49,816 INFO L93 Difference]: Finished difference Result 25172 states and 47317 transitions. [2021-11-07 02:05:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:05:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:05:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:49,952 INFO L225 Difference]: With dead ends: 25172 [2021-11-07 02:05:49,952 INFO L226 Difference]: Without dead ends: 21523 [2021-11-07 02:05:49,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:05:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21523 states. [2021-11-07 02:05:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21523 to 3649. [2021-11-07 02:05:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3644 states have (on average 1.8781558726673984) internal successors, (6844), 3648 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 6844 transitions. [2021-11-07 02:05:50,395 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 6844 transitions. Word has length 61 [2021-11-07 02:05:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:50,396 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 6844 transitions. [2021-11-07 02:05:50,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:50,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 6844 transitions. [2021-11-07 02:05:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:05:50,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:50,401 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:50,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:50,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:50,618 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:05:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash 669985797, now seen corresponding path program 1 times [2021-11-07 02:05:50,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:50,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480787938] [2021-11-07 02:05:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:50,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:50,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:50,622 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:50,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:05:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:51,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:05:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:51,226 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 02:05:51,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:51,377 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 02:05:51,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:51,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480787938] [2021-11-07 02:05:51,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480787938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:51,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:51,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:51,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267943573] [2021-11-07 02:05:51,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:51,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:51,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:51,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:51,380 INFO L87 Difference]: Start difference. First operand 3649 states and 6844 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:52,003 INFO L93 Difference]: Finished difference Result 10844 states and 20367 transitions. [2021-11-07 02:05:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:52,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 63 [2021-11-07 02:05:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:52,023 INFO L225 Difference]: With dead ends: 10844 [2021-11-07 02:05:52,024 INFO L226 Difference]: Without dead ends: 7217 [2021-11-07 02:05:52,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 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 02:05:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7217 states. [2021-11-07 02:05:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7217 to 3649. [2021-11-07 02:05:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3644 states have (on average 1.8751372118551042) internal successors, (6833), 3648 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 6833 transitions. [2021-11-07 02:05:52,278 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 6833 transitions. Word has length 63 [2021-11-07 02:05:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:52,278 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 6833 transitions. [2021-11-07 02:05:52,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 6833 transitions. [2021-11-07 02:05:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:05:52,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:52,284 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:52,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:52,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:52,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:05:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1538911142, now seen corresponding path program 1 times [2021-11-07 02:05:52,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:52,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096249229] [2021-11-07 02:05:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:52,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:52,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:52,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:05:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:52,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:05:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:53,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:53,387 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 02:05:53,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:53,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096249229] [2021-11-07 02:05:53,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096249229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:53,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:53,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:05:53,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662065356] [2021-11-07 02:05:53,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:05:53,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:53,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:05:53,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:05:53,390 INFO L87 Difference]: Start difference. First operand 3649 states and 6833 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:56,265 INFO L93 Difference]: Finished difference Result 39383 states and 73997 transitions. [2021-11-07 02:05:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:05:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:05:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:56,360 INFO L225 Difference]: With dead ends: 39383 [2021-11-07 02:05:56,360 INFO L226 Difference]: Without dead ends: 35759 [2021-11-07 02:05:56,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:05:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35759 states. [2021-11-07 02:05:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35759 to 3651. [2021-11-07 02:05:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3646 states have (on average 1.8732857926494788) internal successors, (6830), 3650 states have internal predecessors, (6830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 6830 transitions. [2021-11-07 02:05:56,758 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 6830 transitions. Word has length 69 [2021-11-07 02:05:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:56,759 INFO L470 AbstractCegarLoop]: Abstraction has 3651 states and 6830 transitions. [2021-11-07 02:05:56,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 6830 transitions. [2021-11-07 02:05:56,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:05:56,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:56,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:56,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:56,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:56,984 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:05:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1519808941, now seen corresponding path program 1 times [2021-11-07 02:05:56,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:56,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381038638] [2021-11-07 02:05:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:56,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:56,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:56,988 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:57,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:05:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:05:57,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:57,671 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 02:05:57,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:57,996 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 02:05:57,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:57,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381038638] [2021-11-07 02:05:57,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381038638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:57,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:57,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:05:57,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909748648] [2021-11-07 02:05:57,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:05:57,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:05:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:05:57,999 INFO L87 Difference]: Start difference. First operand 3651 states and 6830 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:00,529 INFO L93 Difference]: Finished difference Result 39351 states and 73918 transitions. [2021-11-07 02:06:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:06:00,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 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 71 [2021-11-07 02:06:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:00,630 INFO L225 Difference]: With dead ends: 39351 [2021-11-07 02:06:00,630 INFO L226 Difference]: Without dead ends: 35727 [2021-11-07 02:06:00,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:06:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35727 states. [2021-11-07 02:06:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35727 to 3655. [2021-11-07 02:06:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3650 states have (on average 1.872054794520548) internal successors, (6833), 3654 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 6833 transitions. [2021-11-07 02:06:00,990 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 6833 transitions. Word has length 71 [2021-11-07 02:06:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:00,990 INFO L470 AbstractCegarLoop]: Abstraction has 3655 states and 6833 transitions. [2021-11-07 02:06:00,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 6833 transitions. [2021-11-07 02:06:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:06:00,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:00,995 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:01,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:01,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:01,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:01,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1434416934, now seen corresponding path program 1 times [2021-11-07 02:06:01,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:01,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125695162] [2021-11-07 02:06:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:01,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:01,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:01,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:01,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:06:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:01,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:06:01,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:01,885 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 02:06:01,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:02,063 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 02:06:02,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:02,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125695162] [2021-11-07 02:06:02,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125695162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:02,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:02,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:02,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316806072] [2021-11-07 02:06:02,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:02,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:02,065 INFO L87 Difference]: Start difference. First operand 3655 states and 6833 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 02:06:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:02,221 INFO L93 Difference]: Finished difference Result 7258 states and 13597 transitions. [2021-11-07 02:06:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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) Word has length 73 [2021-11-07 02:06:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:02,231 INFO L225 Difference]: With dead ends: 7258 [2021-11-07 02:06:02,231 INFO L226 Difference]: Without dead ends: 3634 [2021-11-07 02:06:02,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 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 02:06:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2021-11-07 02:06:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 3634. [2021-11-07 02:06:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3629 states have (on average 1.8724166437034997) internal successors, (6795), 3633 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 6795 transitions. [2021-11-07 02:06:02,453 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 6795 transitions. Word has length 73 [2021-11-07 02:06:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:02,453 INFO L470 AbstractCegarLoop]: Abstraction has 3634 states and 6795 transitions. [2021-11-07 02:06:02,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 02:06:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 6795 transitions. [2021-11-07 02:06:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:06:02,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:02,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:02,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:02,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:02,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1696480974, now seen corresponding path program 1 times [2021-11-07 02:06:02,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:02,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112312742] [2021-11-07 02:06:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:02,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:02,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:02,684 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:02,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:06:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:06:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:03,354 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 02:06:03,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:03,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:03,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112312742] [2021-11-07 02:06:03,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112312742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:03,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:03,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:06:03,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280583562] [2021-11-07 02:06:03,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:03,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:03,548 INFO L87 Difference]: Start difference. First operand 3634 states and 6795 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:03,918 INFO L93 Difference]: Finished difference Result 7202 states and 13500 transitions. [2021-11-07 02:06:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:06:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:03,926 INFO L225 Difference]: With dead ends: 7202 [2021-11-07 02:06:03,926 INFO L226 Difference]: Without dead ends: 3609 [2021-11-07 02:06:03,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:06:03,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-11-07 02:06:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3609. [2021-11-07 02:06:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3604 states have (on average 1.8731964483906771) internal successors, (6751), 3608 states have internal predecessors, (6751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6751 transitions. [2021-11-07 02:06:04,223 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6751 transitions. Word has length 74 [2021-11-07 02:06:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:04,223 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 6751 transitions. [2021-11-07 02:06:04,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:04,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6751 transitions. [2021-11-07 02:06:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:06:04,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:04,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:04,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:04,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:04,443 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1958765303, now seen corresponding path program 1 times [2021-11-07 02:06:04,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:04,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294230073] [2021-11-07 02:06:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:04,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:04,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:04,446 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:04,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:06:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:06:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:05,135 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 02:06:05,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:05,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:05,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294230073] [2021-11-07 02:06:05,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294230073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:05,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:05,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:05,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223227487] [2021-11-07 02:06:05,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:05,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:05,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:05,294 INFO L87 Difference]: Start difference. First operand 3609 states and 6751 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:05,541 INFO L93 Difference]: Finished difference Result 7177 states and 13456 transitions. [2021-11-07 02:06:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:05,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:06:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:05,551 INFO L225 Difference]: With dead ends: 7177 [2021-11-07 02:06:05,551 INFO L226 Difference]: Without dead ends: 3606 [2021-11-07 02:06:05,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 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 02:06:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-11-07 02:06:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3606. [2021-11-07 02:06:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3601 states have (on average 1.8725354068314357) internal successors, (6743), 3605 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 6743 transitions. [2021-11-07 02:06:05,847 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 6743 transitions. Word has length 75 [2021-11-07 02:06:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:05,848 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 6743 transitions. [2021-11-07 02:06:05,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 6743 transitions. [2021-11-07 02:06:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:06:05,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:05,852 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:05,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:06,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:06,066 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:06,067 INFO L85 PathProgramCache]: Analyzing trace with hash 194041656, now seen corresponding path program 1 times [2021-11-07 02:06:06,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:06,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727676763] [2021-11-07 02:06:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:06,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:06,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:06,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:06,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:06:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:06,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:06:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:06,800 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 02:06:06,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:07,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:07,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727676763] [2021-11-07 02:06:07,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727676763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:07,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:07,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:06:07,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289136720] [2021-11-07 02:06:07,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:06:07,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:06:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:06:07,070 INFO L87 Difference]: Start difference. First operand 3606 states and 6743 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:07,302 INFO L93 Difference]: Finished difference Result 7168 states and 13438 transitions. [2021-11-07 02:06:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:06:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 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 76 [2021-11-07 02:06:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:07,307 INFO L225 Difference]: With dead ends: 7168 [2021-11-07 02:06:07,308 INFO L226 Difference]: Without dead ends: 3604 [2021-11-07 02:06:07,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:06:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-11-07 02:06:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3604. [2021-11-07 02:06:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3599 states have (on average 1.8719088635732148) internal successors, (6737), 3603 states have internal predecessors, (6737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 6737 transitions. [2021-11-07 02:06:07,492 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 6737 transitions. Word has length 76 [2021-11-07 02:06:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:07,493 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 6737 transitions. [2021-11-07 02:06:07,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:07,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 6737 transitions. [2021-11-07 02:06:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:06:07,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:07,497 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:07,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:07,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:07,721 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1134957956, now seen corresponding path program 1 times [2021-11-07 02:06:07,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:07,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704383616] [2021-11-07 02:06:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:07,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:07,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:07,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:07,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:06:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:08,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:06:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:08,461 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 02:06:08,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:08,646 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 02:06:08,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:08,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704383616] [2021-11-07 02:06:08,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704383616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:08,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:08,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:06:08,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209874563] [2021-11-07 02:06:08,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:06:08,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:06:08,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:06:08,648 INFO L87 Difference]: Start difference. First operand 3604 states and 6737 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:08,923 INFO L93 Difference]: Finished difference Result 7161 states and 13423 transitions. [2021-11-07 02:06:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:06:08,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 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 77 [2021-11-07 02:06:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:08,928 INFO L225 Difference]: With dead ends: 7161 [2021-11-07 02:06:08,928 INFO L226 Difference]: Without dead ends: 3602 [2021-11-07 02:06:08,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:06:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-11-07 02:06:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 3602. [2021-11-07 02:06:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 3597 states have (on average 1.8712816235752014) internal successors, (6731), 3601 states have internal predecessors, (6731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 6731 transitions. [2021-11-07 02:06:09,181 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 6731 transitions. Word has length 77 [2021-11-07 02:06:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:09,182 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 6731 transitions. [2021-11-07 02:06:09,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 6731 transitions. [2021-11-07 02:06:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:06:09,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:09,184 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:09,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:09,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:09,385 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:09,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1149977565, now seen corresponding path program 1 times [2021-11-07 02:06:09,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:09,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91493733] [2021-11-07 02:06:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:09,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:09,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:09,391 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:09,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:06:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:10,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:10,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:10,259 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 02:06:10,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:10,505 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 02:06:10,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:10,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91493733] [2021-11-07 02:06:10,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91493733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:10,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:10,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:06:10,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560527602] [2021-11-07 02:06:10,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:10,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:10,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:10,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:10,508 INFO L87 Difference]: Start difference. First operand 3602 states and 6731 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:14,062 INFO L93 Difference]: Finished difference Result 12288 states and 23031 transitions. [2021-11-07 02:06:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:06:14,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 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 78 [2021-11-07 02:06:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:14,070 INFO L225 Difference]: With dead ends: 12288 [2021-11-07 02:06:14,071 INFO L226 Difference]: Without dead ends: 8737 [2021-11-07 02:06:14,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:06:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8737 states. [2021-11-07 02:06:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8737 to 3602. [2021-11-07 02:06:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 3597 states have (on average 1.8073394495412844) internal successors, (6501), 3601 states have internal predecessors, (6501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 6501 transitions. [2021-11-07 02:06:14,363 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 6501 transitions. Word has length 78 [2021-11-07 02:06:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:14,364 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 6501 transitions. [2021-11-07 02:06:14,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 6501 transitions. [2021-11-07 02:06:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:06:14,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:14,367 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:14,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:14,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:14,583 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:14,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1298731663, now seen corresponding path program 1 times [2021-11-07 02:06:14,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:14,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350172404] [2021-11-07 02:06:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:14,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:14,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:14,586 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:14,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:06:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:15,421 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 02:06:15,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:15,639 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 02:06:15,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:15,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350172404] [2021-11-07 02:06:15,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350172404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:15,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:15,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:06:15,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369967325] [2021-11-07 02:06:15,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:15,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:15,642 INFO L87 Difference]: Start difference. First operand 3602 states and 6501 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:17,446 INFO L93 Difference]: Finished difference Result 9696 states and 17707 transitions. [2021-11-07 02:06:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:06:17,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-07 02:06:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:17,454 INFO L225 Difference]: With dead ends: 9696 [2021-11-07 02:06:17,454 INFO L226 Difference]: Without dead ends: 6172 [2021-11-07 02:06:17,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:06:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6172 states. [2021-11-07 02:06:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6172 to 3550. [2021-11-07 02:06:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3545 states have (on average 1.8078984485190408) internal successors, (6409), 3549 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 6409 transitions. [2021-11-07 02:06:17,652 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 6409 transitions. Word has length 86 [2021-11-07 02:06:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:17,652 INFO L470 AbstractCegarLoop]: Abstraction has 3550 states and 6409 transitions. [2021-11-07 02:06:17,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 6409 transitions. [2021-11-07 02:06:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:06:17,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:17,654 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:17,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:17,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:17,859 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash 176451932, now seen corresponding path program 1 times [2021-11-07 02:06:17,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:17,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933383437] [2021-11-07 02:06:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:17,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:17,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:17,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:17,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:06:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:18,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:06:18,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:19,108 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 02:06:19,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:20,964 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 02:06:20,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:20,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933383437] [2021-11-07 02:06:20,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933383437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:20,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:20,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:06:20,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373822791] [2021-11-07 02:06:20,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:20,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:20,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:20,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:20,966 INFO L87 Difference]: Start difference. First operand 3550 states and 6409 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:24,251 INFO L93 Difference]: Finished difference Result 11251 states and 20451 transitions. [2021-11-07 02:06:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:06:24,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 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 89 [2021-11-07 02:06:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:24,263 INFO L225 Difference]: With dead ends: 11251 [2021-11-07 02:06:24,263 INFO L226 Difference]: Without dead ends: 7771 [2021-11-07 02:06:24,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:06:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-11-07 02:06:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 5067. [2021-11-07 02:06:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5062 states have (on average 1.807190833662584) internal successors, (9148), 5066 states have internal predecessors, (9148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 9148 transitions. [2021-11-07 02:06:24,632 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 9148 transitions. Word has length 89 [2021-11-07 02:06:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:24,632 INFO L470 AbstractCegarLoop]: Abstraction has 5067 states and 9148 transitions. [2021-11-07 02:06:24,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 9148 transitions. [2021-11-07 02:06:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 02:06:24,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:24,634 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:24,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:24,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:24,835 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:24,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash 780932315, now seen corresponding path program 1 times [2021-11-07 02:06:24,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:24,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020990714] [2021-11-07 02:06:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:24,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:24,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:24,838 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:24,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:06:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:25,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:06:25,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:25,869 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 02:06:25,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:26,141 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 02:06:26,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:26,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020990714] [2021-11-07 02:06:26,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020990714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:26,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:26,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:06:26,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31055455] [2021-11-07 02:06:26,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:06:26,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:06:26,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:06:26,144 INFO L87 Difference]: Start difference. First operand 5067 states and 9148 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:30,072 INFO L93 Difference]: Finished difference Result 20068 states and 36549 transitions. [2021-11-07 02:06:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:06:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-11-07 02:06:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:30,092 INFO L225 Difference]: With dead ends: 20068 [2021-11-07 02:06:30,092 INFO L226 Difference]: Without dead ends: 15070 [2021-11-07 02:06:30,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:06:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15070 states. [2021-11-07 02:06:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15070 to 5073. [2021-11-07 02:06:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 5068 states have (on average 1.8062352012628256) internal successors, (9154), 5072 states have internal predecessors, (9154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 9154 transitions. [2021-11-07 02:06:30,605 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 9154 transitions. Word has length 90 [2021-11-07 02:06:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:30,605 INFO L470 AbstractCegarLoop]: Abstraction has 5073 states and 9154 transitions. [2021-11-07 02:06:30,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 9154 transitions. [2021-11-07 02:06:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:06:30,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:30,609 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:30,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:30,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:30,823 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash 383808506, now seen corresponding path program 1 times [2021-11-07 02:06:30,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:30,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647882121] [2021-11-07 02:06:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:30,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:30,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:30,825 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:30,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:06:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:31,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:31,870 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 02:06:31,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:32,118 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 02:06:32,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:32,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647882121] [2021-11-07 02:06:32,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647882121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:32,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:32,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:32,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683096416] [2021-11-07 02:06:32,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:32,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:32,121 INFO L87 Difference]: Start difference. First operand 5073 states and 9154 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:35,487 INFO L93 Difference]: Finished difference Result 14509 states and 26408 transitions. [2021-11-07 02:06:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:06:35,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-11-07 02:06:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:35,499 INFO L225 Difference]: With dead ends: 14509 [2021-11-07 02:06:35,499 INFO L226 Difference]: Without dead ends: 9492 [2021-11-07 02:06:35,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:06:35,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9492 states. [2021-11-07 02:06:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9492 to 6671. [2021-11-07 02:06:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6666 states have (on average 1.7662766276627664) internal successors, (11774), 6670 states have internal predecessors, (11774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 11774 transitions. [2021-11-07 02:06:36,063 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 11774 transitions. Word has length 91 [2021-11-07 02:06:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:36,064 INFO L470 AbstractCegarLoop]: Abstraction has 6671 states and 11774 transitions. [2021-11-07 02:06:36,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 11774 transitions. [2021-11-07 02:06:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 02:06:36,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:36,067 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:36,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:36,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:36,283 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:36,283 INFO L85 PathProgramCache]: Analyzing trace with hash 512488434, now seen corresponding path program 1 times [2021-11-07 02:06:36,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:36,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21476032] [2021-11-07 02:06:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:36,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:36,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:36,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:36,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:06:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:06:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:37,340 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 02:06:37,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:37,605 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 02:06:37,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:37,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21476032] [2021-11-07 02:06:37,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21476032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:37,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:37,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:06:37,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243871777] [2021-11-07 02:06:37,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:06:37,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:06:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:06:37,609 INFO L87 Difference]: Start difference. First operand 6671 states and 11774 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:40,402 INFO L93 Difference]: Finished difference Result 44414 states and 79006 transitions. [2021-11-07 02:06:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:06:40,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-07 02:06:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:40,451 INFO L225 Difference]: With dead ends: 44414 [2021-11-07 02:06:40,451 INFO L226 Difference]: Without dead ends: 37808 [2021-11-07 02:06:40,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:06:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37808 states. [2021-11-07 02:06:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37808 to 10246. [2021-11-07 02:06:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10246 states, 10241 states have (on average 1.776193731080949) internal successors, (18190), 10245 states have internal predecessors, (18190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10246 states to 10246 states and 18190 transitions. [2021-11-07 02:06:41,287 INFO L78 Accepts]: Start accepts. Automaton has 10246 states and 18190 transitions. Word has length 93 [2021-11-07 02:06:41,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:41,287 INFO L470 AbstractCegarLoop]: Abstraction has 10246 states and 18190 transitions. [2021-11-07 02:06:41,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 10246 states and 18190 transitions. [2021-11-07 02:06:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 02:06:41,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:41,289 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:41,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:41,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:41,489 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash 440101876, now seen corresponding path program 1 times [2021-11-07 02:06:41,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:41,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34650482] [2021-11-07 02:06:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:41,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:41,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:41,491 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:41,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:06:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:42,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:42,675 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 02:06:42,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:42,956 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 02:06:42,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:42,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34650482] [2021-11-07 02:06:42,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34650482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:42,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:42,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:06:42,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869820352] [2021-11-07 02:06:42,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:42,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:42,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:42,960 INFO L87 Difference]: Start difference. First operand 10246 states and 18190 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:45,259 INFO L93 Difference]: Finished difference Result 21489 states and 38274 transitions. [2021-11-07 02:06:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:06:45,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-07 02:06:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:45,280 INFO L225 Difference]: With dead ends: 21489 [2021-11-07 02:06:45,280 INFO L226 Difference]: Without dead ends: 16078 [2021-11-07 02:06:45,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:06:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16078 states. [2021-11-07 02:06:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16078 to 10232. [2021-11-07 02:06:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10232 states, 10227 states have (on average 1.7758873569961866) internal successors, (18162), 10231 states have internal predecessors, (18162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10232 states to 10232 states and 18162 transitions. [2021-11-07 02:06:45,991 INFO L78 Accepts]: Start accepts. Automaton has 10232 states and 18162 transitions. Word has length 93 [2021-11-07 02:06:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:45,991 INFO L470 AbstractCegarLoop]: Abstraction has 10232 states and 18162 transitions. [2021-11-07 02:06:45,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 10232 states and 18162 transitions. [2021-11-07 02:06:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 02:06:45,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:45,995 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:46,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:46,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:46,195 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash -919907074, now seen corresponding path program 1 times [2021-11-07 02:06:46,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:46,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490586610] [2021-11-07 02:06:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:46,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:46,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:46,197 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:46,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:06:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:47,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:47,397 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 02:06:47,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:47,666 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 02:06:47,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:47,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490586610] [2021-11-07 02:06:47,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490586610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:47,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:47,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:06:47,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934488502] [2021-11-07 02:06:47,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:47,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:47,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:47,668 INFO L87 Difference]: Start difference. First operand 10232 states and 18162 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:48,885 INFO L93 Difference]: Finished difference Result 25648 states and 45550 transitions. [2021-11-07 02:06:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:48,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-07 02:06:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:48,905 INFO L225 Difference]: With dead ends: 25648 [2021-11-07 02:06:48,906 INFO L226 Difference]: Without dead ends: 17281 [2021-11-07 02:06:48,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17281 states. [2021-11-07 02:06:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17281 to 17266. [2021-11-07 02:06:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17266 states, 17261 states have (on average 1.7826892995770813) internal successors, (30771), 17265 states have internal predecessors, (30771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17266 states to 17266 states and 30771 transitions. [2021-11-07 02:06:50,061 INFO L78 Accepts]: Start accepts. Automaton has 17266 states and 30771 transitions. Word has length 100 [2021-11-07 02:06:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:50,061 INFO L470 AbstractCegarLoop]: Abstraction has 17266 states and 30771 transitions. [2021-11-07 02:06:50,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17266 states and 30771 transitions. [2021-11-07 02:06:50,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 02:06:50,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:50,064 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:50,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:50,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:50,265 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1477105537, now seen corresponding path program 1 times [2021-11-07 02:06:50,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:50,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557929306] [2021-11-07 02:06:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:50,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:50,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:50,267 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:50,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:06:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:51,664 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 02:06:51,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:51,936 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 02:06:51,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:51,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557929306] [2021-11-07 02:06:51,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557929306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:51,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:51,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:06:51,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106565802] [2021-11-07 02:06:51,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:51,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:51,938 INFO L87 Difference]: Start difference. First operand 17266 states and 30771 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:54,006 INFO L93 Difference]: Finished difference Result 45482 states and 80995 transitions. [2021-11-07 02:06:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:54,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-07 02:06:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:54,041 INFO L225 Difference]: With dead ends: 45482 [2021-11-07 02:06:54,041 INFO L226 Difference]: Without dead ends: 31153 [2021-11-07 02:06:54,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31153 states. [2021-11-07 02:06:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31153 to 31138. [2021-11-07 02:06:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31138 states, 31133 states have (on average 1.7861112003340507) internal successors, (55607), 31137 states have internal predecessors, (55607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31138 states to 31138 states and 55607 transitions. [2021-11-07 02:06:56,237 INFO L78 Accepts]: Start accepts. Automaton has 31138 states and 55607 transitions. Word has length 101 [2021-11-07 02:06:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:56,237 INFO L470 AbstractCegarLoop]: Abstraction has 31138 states and 55607 transitions. [2021-11-07 02:06:56,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 31138 states and 55607 transitions. [2021-11-07 02:06:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 02:06:56,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:56,241 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:56,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:56,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:56,455 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:56,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1859948615, now seen corresponding path program 1 times [2021-11-07 02:06:56,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:56,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116240407] [2021-11-07 02:06:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:56,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:56,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:56,458 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:56,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:06:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:57,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:57,748 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 02:06:57,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:58,020 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 02:06:58,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:58,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116240407] [2021-11-07 02:06:58,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116240407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:58,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:58,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:06:58,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789017428] [2021-11-07 02:06:58,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:58,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:58,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:58,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:58,022 INFO L87 Difference]: Start difference. First operand 31138 states and 55607 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:01,978 INFO L93 Difference]: Finished difference Result 84758 states and 151084 transitions. [2021-11-07 02:07:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:01,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-07 02:07:01,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:02,061 INFO L225 Difference]: With dead ends: 84758 [2021-11-07 02:07:02,061 INFO L226 Difference]: Without dead ends: 58485 [2021-11-07 02:07:02,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:02,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58485 states. [2021-11-07 02:07:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58485 to 58470. [2021-11-07 02:07:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58470 states, 58465 states have (on average 1.7864876421790814) internal successors, (104447), 58469 states have internal predecessors, (104447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58470 states to 58470 states and 104447 transitions. [2021-11-07 02:07:06,522 INFO L78 Accepts]: Start accepts. Automaton has 58470 states and 104447 transitions. Word has length 102 [2021-11-07 02:07:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:06,523 INFO L470 AbstractCegarLoop]: Abstraction has 58470 states and 104447 transitions. [2021-11-07 02:07:06,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 58470 states and 104447 transitions. [2021-11-07 02:07:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 02:07:06,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:06,527 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:06,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:06,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:06,752 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1730521308, now seen corresponding path program 1 times [2021-11-07 02:07:06,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:06,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089153231] [2021-11-07 02:07:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:06,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:06,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:06,754 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:06,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca094842-b7a8-4957-b94b-d3b11c3c2a28/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:07:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:07,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:08,187 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 02:07:08,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:08,494 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 02:07:08,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:08,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089153231] [2021-11-07 02:07:08,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089153231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:08,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:08,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:07:08,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943118754] [2021-11-07 02:07:08,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:08,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:08,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:08,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:08,497 INFO L87 Difference]: Start difference. First operand 58470 states and 104447 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:16,475 INFO L93 Difference]: Finished difference Result 162486 states and 289517 transitions. [2021-11-07 02:07:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:16,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-11-07 02:07:16,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:16,654 INFO L225 Difference]: With dead ends: 162486 [2021-11-07 02:07:16,655 INFO L226 Difference]: Without dead ends: 112305 [2021-11-07 02:07:16,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112305 states.